How to conjugate entusiasmar in Spanish

entusiasmar in Spanish means to enthuse, 

entusiasmar is a regular verb. That means this verb does follow the traditional conjugation patterns in all verb tenses. 

Let’s learn how to conjugate the verb entusiasmar so you can use it comfortably in all tenses. 

entusiasmar in the Present Tense

The present tense is used to talk about actions or events happening now. 

The verb entusiasmar is regular in the present tense. 

The verb entusiasmar is what we call an -ar verb. -ar verbs are verbs that end in -ar. Regular -ar verbs are conjugated by following 2 major rules. 

1. Take off the -ar
2. Replace with a new ending depending on who performs the action. 

To review -ar verbs watch my -ar verbs video: 

Just in case you need to review conjugation of -er and -ir verbs, Click for Page: 

Below you will find the conjugations of the verb entusiasmar in the indicative present tense:

Pronoun	Spanish	English
Yo	entusiasmo	I enthuse
Tú	entusiasmas	you enthuse
Él / Ella / Usted (Ud.)	entusiasma	he/she enthusees, you (formal) enthusees
Nosotros (as)	entusiasmamos	we enthuse
Vosotros (as)	entusiasmaís	you (plural) Spain enthuse
Ellas / Ellos / Ustedes (Uds.)	entusiasman	they enthuse, you (plural) enthuse

entusiasmar in the Preterite Tense

The preterite is used to talk about actions that have already been completed. These actions have a clear beginning or ending. The preterite tense is often used with phrases that give a specific time frame.  More on the Preterite Tense Here

Things to remember: 

1. The preterite is NOT used to describe actions or events that are repeated or continuous in the past. That means that those actions do not have a clear beginning or end. 
2. The preterite is NOT used to describe people in the past.

The verb entusiasmar is Regular in the preterite. That means it does follow the pattern of regular -ar verbs in the preterite. To review -ar verbs watch my -ar verbs video:  https://youtu.be/Pi5rlDOeOnM 

Below you will find the conjugations of the verb entusiasmar in the preterite tense:

Pronoun	Spanish	English
Yo	entusiasmé	I enthused
Tú	entusiasmaste	you enthused
Él / Ella / Usted (Ud.)	entusiasmó	he/she enthused, you (formal) enthused
Nosotros (as)	entusiasmamos	we enthused
Vosotros (as)	entusiasmasteis	you (plural) Spain enthused
Ellas / Ellos / Ustedes (Uds.)	entusiasmaron	they enthused, you (plural) enthused

Below are some expressions that are often used when using the preterite:

la semana pasada	last week
el mes pasado	last month
el fin de semana pasado	last weekend
el año pasado	last year
ayer	yesterday
anteayer	the day before yesterday
anoche	last night

entusiasmar in the Imperfect Tense

The imperfect is a form of past tense. It is primarily used to talk about continuous, repeated, usual or habitual actions in the past. It can also be used to talk about what someone or something was like in the past, what someone used to be or used to do. The imperfect is used when actions don’t have a specific beginning or end. 

The verb entusiasmar is regular in the imperfect tense. 

The verb entusiasmar is what we call an -ar verb. -ar verbs are verbs that end in -ar. Regular -ar verbs are conjugated by following 2 major rules. 

1. Take off the -ar
2. Replace with a new ending depending on who performs the action. 

To review how to conjugate -ar verbs in the imperfect watch my video: Click for Video 

To review how to conjugate -er and -ir verbs in the imperfect watch my video: Click for Video 

Below you will find the conjugations of the verb entusiasmar in the imperfect tense:

Pronoun	Spanish	English
Yo	entusiasmaba	I used to enthuse
Tú	entusiasmabas	you used to enthuse
Él / Ella / Usted (Ud.)	entusiasmaba	he/she used to enthuse, you (formal) used to enthuse
Nosotros (as)	entusiasmábamos	we used to enthuse
Vosotros (as)	entusiasmabais	you (plural) Spain used to enthuse
Ellas / Ellos / Ustedes (Uds.)	entusiasmaban	they used to enthuse, you (plural) used to enthuse

Below are some expressions that are often used when using the Imperfect:

a menudo	often
usualmente	usually
todos los días	every day
todos los meses	every month
todos los años	every year
casi siempre	almost always
a veces	sometimes
de niño/niña	as a child …
siempre	always
normalmente	normally

entusiasmar in the Future Tense

The future is used to talk about an action or event that will happen in the future. 

The verb entusiasmar is regular in the future tense. 

To form the future tense of regular -ar, -er and -ir verbs add the following endings to the verb in the infinitive (verbs that have not been conjugated and end in -ar, -er, -ir). The verb entusiasmar is in its purest form (it has not been conjugated) it’s in the infinitive.  

The verb entusiasmar is what we call an -ar verb. -ar verbs are verbs that end in -ar. To conjugate entusiasmar in the future, follow these two rules: 

1. Find the infinitive of the verb (verbs that have not been conjugated and end in -ar, -er, -ir). In this case entusiasmar.
2. Then attach the ending to the end of the infinitive. The ending depends on who is performing the action. 

Yo	é
Tú	ás
Él / Ella / Usted (Ud.)	á
Nosotros (as)	emos
Vosotros (as)	éis
Ellas / Ellos / Ustedes (Uds.)	án

Below you will find the conjugations of the verb entusiasmar using the future tense:

Pronoun	Spanish	English
Yo	entusiasmaré	I will enthuse
Tú	entusiasmarás	you will enthuse
Él / Ella / Usted (Ud.)	entusiasmará	he/she will enthuse, you (formal) will enthuse
Nosotros (as)	entusiasmaremos	we will enthuse
Vosotros (as)	entusiasmaréis	you (plural) Spain will enthuse
Ellas / Ellos / Ustedes (Uds.)	entusiasmarán	they will enthuse, you (plural) will enthuse

entusiasmar in the Informal Future Tense

The informal future is used to talk about an action or event that is going to take place in the near future. To form the informal future, you must use the correct form of the verb ir (to go) + a + the verb in the infinitive. 

The verb entusiasmar is regular in the informal future tense. 

Follow this rule:

1. Ir (conjugated) + a + infinitive (verb that ends in -ar, -er, -ir and has not been conjugated).  Example : Yo voy a entusiasmar 

The conjugation of the verb ir (to go) in the present tense are:

Yo	voy
Tú	vas
Él / Ella / Usted (Ud.)	va
Nosotros (as)	vamos
Vosotros (as)	vais
Ellas / Ellos / Ustedes (Uds.)	van

To review how to conjugate the informal future watch my video: Click for Video 

Below you will find the conjugations of the verb entusiasmar using the informal future:

Pronoun	Spanish	English
Yo	voy a entusiasmar	I will enthuse
Tú	vas a entusiasmar	you will enthuse
Él / Ella / Usted (Ud.)	va a entusiasmar	he/she will enthuse, you (formal) will enthuse
Nosotros (as)	vamos a entusiasmar	we will enthuse
Vosotros (as)	vais a entusiasmar	you (plural) Spain will enthuse
Ellas / Ellos / Ustedes (Uds.)	van a entusiasmar	they will enthuse, you (plural) will enthuse

entusiasmar in the Present Progressive Tense.

The present progressive is used to talk about actions or events happening now. In other words, we use the present progressive to talk about actions that are in the process of happening at the current moment. 

The verb entusiasmar is regular in the present progressive tense. 

The present progressive is formed by using the correct form of the verb estar (to be) plus the present participle (-ing form of a verb). 

To form the present participle of a verb:

1. Find the verb in the infinitive (verb that ends in -ar, -er, -ir)
2. Remove the ending (-ar, -er, -ir).
3. Add -ando for -ar verbs
4. Add -iendo for -er and –ir verbs

The conjugations of the verb estar in the present tense are:

Yo	estoy
Tú	estás
Él / Ella / Usted (Ud.)	está
Nosotros (as)	estamos
Vosotros (as)	estáis
Ellas / Ellos / Ustedes (Uds.)	están

The present participle of the verb entusiasmar is: entusiasmando

To review the present progressive and present participles in Spanish, watch my Present Progressive Video:Click for Video 

Just in case you need to review the verb estar, watch my Estar video: Click for Video 

Below you will find the conjugations of the verb entusiasmar using the present progressive:

Pronoun	Spanish	English
Yo	estoy entusiasmando	I am enthusing
Tú	estás entusiasmando	you are enthusing
Él / Ella / Usted (Ud.)	está entusiasmando	he/she is enthusing, you (formal) are enthusing
Nosotros (as)	estamos entusiasmando	we are enthusing
Vosotros (as)	estáis entusiasmando	you (plural) Spain are enthusing
Ellas / Ellos / Ustedes (Uds.)	están entusiasmando	they are enthusing, you (plural) are enthusing

entusiasmar in the Conditional Tense

The conditional tense is used to talk about actions or events that may happen in the future. Think of it as a possibility, a hypothesis, a probability. 

The verb entusiasmar is regular in the conditional tense. 

The verb entusiasmar is what we call an -ar verb. -ar verbs are verbs that end in -ar. To conjugate entusiasmar in the conditional tense follow these two rules: 

1. Find the infinitive of the verb (verbs that have not been conjugated and end in -ar, -er, -ir). In this case entusiasmar.
2. Then attach the ending to the end of the infinitive. The ending depends on who is performing the action. 

To form the conditional of a verb add the following endings to the infinitive of the verb: 

Yo	ía
Tú	ías
Él / Ella / Usted (Ud.)	ía
Nosotros (as)	íamos
Vosotros (as)	íais
Ellas / Ellos / Ustedes (Uds.)	ían

The infinitive of the verb entusiasmar is entusiasmar. 

Below you will find the conjugations of the verb entusiasmar using the conditional tense:

Pronoun	Spanish	English
Yo	entusiasmaría	I would enthuse
Tú	entusiasmarías	you would enthuse
Él / Ella / Usted (Ud.)	entusiasmaría	he/she would enthuse, you (formal) would enthuse
Nosotros (as)	entusiasmaríamos	we would enthuse
Vosotros (as)	entusiasmarías	you (plural) Spain would enthuse
Ellas / Ellos / Ustedes (Uds.)	entusiasmarían	they would enthuse, you (plural)would enthuse

entusiasmar in the Present Perfect Tense

The present perfect is used to talk about actions or events that have started recently (in the past) and are still happening. It can also be used to talk about things that have been done recently or to describe experiences a person has had in their lives. 

The verb entusiasmar is regular in the conditional tense. 

To form the present perfect tense, you must use the helping verb “haber” in the present tense. This will let us know who has performed the action. Then, we add the past participle of the verb. 

The conjugations of haber in the present tense are:

Yo	he
Tú	has
Él / Ella / Usted (Ud.)	ha
Nosotros (as)	hemos
Vosotros (as)	habéis
Ellas / Ellos / Ustedes (Uds.)	han

To form the past participle of a verb:

1. Find the verb in the infinitive (verb that ends in -ar, -er, -ir)
2. Remove the ending (-ar, -er, -ir).
3. Add -ado for -ar verbs
4. Add -ido for -er and –ir verbs

To summarize. Correct form of haber in the present + past participle = present perfect. 

Below you will find the conjugations of the verb entusiasmar in the present perfect:

Pronoun	Spanish	English
Yo	he entusiasmado	I have enthused
Tú	has entusiasmado	you have enthused
Él / Ella / Usted (Ud.)	ha entusiasmado	he/she have enthused, you (formal) have enthused
Nosotros (as)	hemos entusiasmado	we have enthused
Vosotros (as)	habéis entusiasmado	you (plural) Spain have enthused
Ellas / Ellos / Ustedes (Uds.)	han entusiasmado	they have enthused, you (plural) have enthused

entusiasmar in the Past Perfect Tense (Pretérito Pluscuamperfecto) 

The past perfect is used to talk about actions or events that happened before. It is widely used to describe a series of events and it comes in handy to tell stories. 

The verb entusiasmar is regular in the past perfect tense. 

To form the past perfect you must use the verb haber in the imperfect. This will let us know who has performed the action. 

The conjugations of haber in the imperfect tense are:

Yo	había
Tú	habías
Él / Ella / Usted (Ud.)	había
Nosotros (as)	habíamos
Vosotros (as)	habíais
Ellas / Ellos / Ustedes (Uds.)	habían

Then, we add the past participle of the verb. In this case entusiasmar. 

To form the past participle of a verb:

1. Find the verb in the infinitive (verb that ends in -ar, -er, -ir)
2. Remove the ending (-ar, -er, -ir).
3. Add -ado for -ar verbs
4. Add -ido for -er and –ir verbs

To summarize. Use the correct form of haber in the imperfect + past participle = past perfect. 

Below you will find the conjugations of the verb entusiasmar in the past perfect:

Pronoun	Spanish	English
Yo	había entusiasmado	I had enthused
Tú	habías entusiasmado	you had enthused
Él / Ella / Usted (Ud.)	había entusiasmado	he/she had enthused, you (formal) had enthused
Nosotros (as)	habíamos entusiasmado	we had enthused
Vosotros (as)	habíais entusiasmado	you (plural) Spain had enthused
Ellas / Ellos / Ustedes (Uds.)	habíain entusiasmado	they had enthused, you (plural) had enthused

entusiasmar in the Future Perfect Tense

The future perfect is used to talk about something that hasn’t happened yet but is predicted to take place. It is used to describe what will have happened in the future.

The verb entusiasmar is regular in the future perfect tense. 

To form the future perfect you must use the verb haber in the simple future tense. This will let us know who has performed the action. 

The conjugations of haber in the future tense are:

Yo	habré
Tú	habrás
Él / Ella / Usted (Ud.)	habrá
Nosotros (as)	habremos
Vosotros (as)	habréis
Ellas / Ellos / Ustedes (Uds.)	habrán

Then, we add the past participle of the verb. In this case entusiasmar. To form the past participle, you simply add the appropriate ending to the stem of the verb. 

To form the past participle of a verb:

1. Find the verb in the infinitive (verb that ends in -ar, -er, -ir)
2. Remove the ending (-ar, -er, -ir).
3. Add -ado for -ar verbs
4. Add -ido for -er and –ir verbs

To summarize. Correct form of haber in the simple future tense + past participle = future perfect. 

Below you will find the conjugations of the verb entusiasmar in the future perfect:

Pronoun	Spanish	English
Yo	habré entusiasmado	I will have enthused
Tú	habrás entusiasmado	you will have enthused
Él / Ella / Usted (Ud.)	habrá entusiasmado	he/she will have enthused, you (formal) will have enthused
Nosotros (as)	habremos entusiasmado	we will have enthused
Vosotros (as)	habréis entusiasmado	you (plural) Spain will have enthused
Ellas / Ellos / Ustedes (Uds.)	habrán entusiasmado	they will have enthused, you (plural) will have enthused

entusiasmar in the Conditional Perfect Tense

The conditional perfect is used to talk about an action or event that would have happened in the past but didn’t take place due to another action happening. It is used to express possibility in the past. Basically think of it as actions that could or would have taken place if … 

The verb entusiasmar is regular in the conditional perfect tense. 

To form the conditional perfect you must use the verb haber in the conditional. This will let us know who has performed the action.

The conjugations of haber in the conditional tense are:

Yo	habría
Tú	habrías
Él / Ella / Usted (Ud.)	habría
Nosotros (as)	habríamos
Vosotros (as)	habríais
Ellas / Ellos / Ustedes (Uds.)	habrían

 Then, we add the past participle of the verb. In this case entusiasmar. To form the past participle, you simply add the appropriate ending to the stem of the verb. 

To form the past participle of a verb:

1. Find the verb in the infinitive (verb that ends in -ar, -er, -ir)
2. Remove the ending (-ar, -er, -ir).
3. Add -ado for -ar verbs
4. Add -ido for -er and –ir verbs

Below you will find the conjugations of the verb entusiasmar in the conditional perfect:

Pronoun	Spanish	English
Yo	habría entusiasmado	I would have enthused
Tú	habrías entusiasmado	you would have enthused
Él / Ella / Usted (Ud.)	habría entusiasmado	he/she would have enthused, you (formal) would have enthused
Nosotros (as)	habríamos entusiasmado	we would have enthused
Vosotros (as)	habríais entusiasmado	you (plural) Spain will would enthused
Ellas / Ellos / Ustedes (Uds.)	habrían entusiasmado	they would have enthused, you (plural) would have enthused

entusiasmar in the Subjunctive Present Tense

The Subjunctive present is used to talk about situations of uncertainty. For example emotions such as wishes, desires and hopes. The main difference between the subjunctive and the indicative mode is that the subjunctive is uncertain, hypothetical or not real. 

The verb entusiasmar is Regular in the subjunctive present form. 

To form the subjunctive present of most verbs, you must take off the -o endings of the yo form of the present simple and then add a new ending based on who is performing the action.

Subjunctive present endings for -ar:

Yo	e
Tú	es
Él / Ella / Usted (Ud.)	e
Nosotros (as)	emos
Vosotros (as)	éis
Ellas / Ellos / Ustedes (Uds.)	en

Subjunctive present endings for -er and -ir verbs: 

Yo	a
Tú	as
Él / Ella / Usted (Ud.)	as
Nosotros (as)	amos
Vosotros (as)	áis
Ellas / Ellos / Ustedes (Uds.)	an

Below you will find the conjugations of the verb entusiasmar in the subjunctive present:

Pronoun	Spanish	English
Yo	entusiasme	I may enthuse
Tú	entusiasmes	you may enthuse
Él / Ella / Usted (Ud.)	entusiasme	he/she may enthuse, you (formal) may enthuse
Nosotros (as)	entusiasmemos	we may enthuse
Vosotros (as)	entusiasméis	you (plural) Spain may enthuse
Ellas / Ellos / Ustedes (Uds.)	entusiasmen	they may enthuse, you (plural) may enthuse

entusiasmar in the Subjunctive Imperfect Tense

The subjunctive imperfect is used to talk about situations of uncertainty in the past. For example emotions such as wishes, desires and hopes in the past. It is also used to express politeness or deference, primarily when making a request. 

The verb entusiasmar is regular in the subjunctive imperfect tense. 

To form the subjunctive imperfect find the ellos/ellas form of the verb in the preterite, take off -aron or -ieron and add a new ending. 

Subjunctive Imperfect endings for -ar verbs like entusiasmar the endings are:

Yo	ara
Tú	aras
Él / Ella / Usted (Ud.)	ara
Nosotros (as)	áramos
Vosotros (as)	arais
Ellas / Ellos / Ustedes (Uds.)	aran

You can also use the endings below as alternative endings and the meaning doesn’t change. Keep in mind the ones above are more common

Yo	ase
Tú	ases
Él / Ella / Usted (Ud.)	ase
Nosotros (as)	ásemos
Vosotros (as)	aseis
Ellas / Ellos / Ustedes (Uds.)	asen

Subjunctive Imperfect endings for -er & -ir verbs like he endings are:

Yo	iera
Tú	ieras
Él / Ella / Usted (Ud.)	iera
Nosotros (as)	iéramos
Vosotros (as)	ierais
Ellas / Ellos / Ustedes (Uds.)	ieran

You can also use the endings below as alternative endings and the meaning doesn’t change. Keep in mind the ones above are more common:

Yo	iese
Tú	ieses
Él / Ella / Usted (Ud.)	iese
Nosotros (as)	iésemos
Vosotros (as)	ieseis
Ellas / Ellos / Ustedes (Uds.)	iesen

Here are the steps in action:

1. entusiasmar

2. The third person of the preterite (ellos/ellas) would be: entusiasmar – entusiasmaron

3. Now remove -aron and you are left with entusiasm

4. Then, add a new ending.

Below you will find the conjugations of the verb entusiasmar in the subjunctive imperfect:

Pronoun	Spanish	English
Yo	entusiasmara	I might enthuse
Tú	entusiasmaras	you might enthuse
Él / Ella / Usted (Ud.)	entusiasmara	he/she might enthuse, you (formal) might enthuse
Nosotros (as)	entusiasmáramos	we might enthuse
Vosotros (as)	entusiasmarais	you (plural) Spain might enthuse
Ellas / Ellos / Ustedes (Uds.)	entusiasmaran	they might enthuse, you (plural) might enthuse

OR

Pronoun	Spanish	English
Yo	entusiasmase	I might enthuse
Tú	entusiasmases	you might enthuse
Él / Ella / Usted (Ud.)	entusiasmase	he/she might enthuse, you (formal) might enthuse
Nosotros (as)	entusiasmásamos	we might enthuse
Vosotros (as)	entusiasmasais	you (plural) Spain might enthuse
Ellas / Ellos / Ustedes (Uds.)	entusiasmasan	they might enthuse, you (plural) might enthuse

entusiasmar in the Subjunctive Future Tense

The subjunctive future is used to describe an event or action or a possible or hypothetical situation. It can also be used to describe something you wished or hoped would happen in the future. This tense is rarely used in Spanish but it doesn’t hurt to learn it.

The verb entusiasmar is regular in the subjunctive future tense. 

To form the future subjunctive simply add the following endings to the verb in the infinitive (the most pure form of the verb. Verbs in the infinitive have not been conjugated (they end in -ar, -er & -ir)).

Subjunctive Future endings for -ar verbs like entusiasmar the endings are:

Yo	e
Tú	es
Él / Ella / Usted (Ud.)	e
Nosotros (as)	emos (accent on á of the stem)
Vosotros (as)	eis
Ellas / Ellos / Ustedes (Uds.)	en

Subjunctive Future endings for -er verbs the endings are:

Yo	iere
Tú	ieres
Él / Ella / Usted (Ud.)	iere
Nosotros (as)	iéremos
Vosotros (as)	iereis
Ellas / Ellos / Ustedes (Uds.)	ieran

Subjunctive Future endings for -ir verbs the endings are:

Yo	iere
Tú	ieres
Él / Ella / Usted (Ud.)	iere
Nosotros (as)	iéremos
Vosotros (as)	iereis
Ellas / Ellos / Ustedes (Uds.)	ieren

Below you will find the conjugations of the verb entusiasmar in the subjunctive future:

Pronoun	Spanish	English
Yo	entusiasmara	I will enthuse
Tú	entusiasmaras	you will enthuse
Él / Ella / Usted (Ud.)	entusiasmara	he/she will enthuse, you (formal) will enthuse
Nosotros (as)	entusiasmáramos	we will enthuse
Vosotros (as)	entusiasmarais	you (plural) Spain will enthuse
Ellas / Ellos / Ustedes (Uds.)	entusiasmaran	they will enthuse, you (plural) will enthuse

entusiasmar in the Subjunctive Present Perfect Tense

The subjunctive present perfect is used to describe actions that are connected to the present. It is also used to talk about actions that will have happened by a certain time in the future. 

The verb entusiasmar is regular in the subjunctive present perfect tense. 

To form the subjunctive present perfect you must use the present subjunctive of the verb haber  + the past participle of the verb. 

Here are the conjugations of the verb haber in the present subjunctive:

Yo	haya
Tú	hayas
Él / Ella / Usted (Ud.)	haya
Nosotros (as)	hayamos
Vosotros (as)	hayáis
Ellas / Ellos / Ustedes (Uds.)	hayan

The past participle of the verb entusiasmar is: entusiasmado

Now, let’s put it together . Here are the conjugations of the verb entusiasmar in the subjunctive present perfect. 

Pronoun	Spanish	English
Yo	haya entusiasmado	I may have enthused
Tú	hayas entusiasmado	you may have enthused
Él / Ella / Usted (Ud.)	haya entusiasmado	he/she may have enthused, you (formal) may have enthused
Nosotros (as)	hayamos entusiasmado	we may have enthused
Vosotros (as)	hayáis entusiasmado	you (plural) Spain may have enthused
Ellas / Ellos / Ustedes (Uds.)	hayan entusiasmado	they may have enthused, you (plural) may have enthused

entusiasmar in the Subjunctive Past Perfect Tense (Pluscuamperfecto del Subjuntivo)

The subjunctive past perfect is used to talk about hypothetical situations or actions in the past. It can also be used to talk about past actions that preceded other past actions. 

The verb entusiasmar is regular in the subjunctive past perfect tense. 

To form the subjunctive past perfect you must use the imperfect subjunctive of the verb haber  + the past participle of the verb. 

The imperfect subjunctive of haber can be conjugated in two different ways. Having said that, the first conjugations are more commonly used. 

Here are the conjugations of the verb haber in the imperfect subjunctive of the verb haber:

Yo	hubiera
Tú	hubieras
Él / Ella / Usted (Ud.)	hubiera
Nosotros (as)	hubiéramos
Vosotros (as)	hubierais
Ellas / Ellos / Ustedes (Uds.)	hubieran

The other conjugations of haber in the imperfect subjunctive are:

Yo	hubiese
Tú	hubieses
Él / Ella / Usted (Ud.)	hubiese
Nosotros (as)	hubiésemos
Vosotros (as)	hubieseis
Ellas / Ellos / Ustedes (Uds.)	hubiesen

To form the past participle of a verb:

5. Find the verb in the infinitive (verb that ends in -ar, -er, -ir)
6. Remove the ending (-ar, -er, -ir).
7. Add -ado for -ar verbs
8. Add -ido for -er and –ir verbs

Let’s apply it to entusiasmar:

1. Find the verb in the infinitive (verb that ends in -ar, -er, -ir)  = (entusiasmar)
2. Remove the ending (-ar, -er, -ir) = (entusiasm)
3. Add -ado for -ar verbs  = (entusiasmado)

The past participle of the verb entusiasmar is entusiasmado.

Now, let’s put it together . Here are the conjugations of the verb entusiasmar in the subjunctive past perfect. 

Pronoun	Spanish	English
Yo	hubiese entusiasmado	I might have enthused
Tú	hubieses entusiasmado	you might have enthused
Él / Ella / Usted (Ud.)	hubiese entusiasmado	he/she might have enthused, you (formal) might have enthused
Nosotros (as)	hubiésemos entusiasmado	we might have enthused
Vosotros (as)	hubieseis entusiasmado	you (plural) Spain might have enthused
Ellas / Ellos / Ustedes (Uds.)	hubiesen entusiasmado	they might have enthused, you (plural) might have enthused

OR

Pronoun	Spanish	English
Yo	hubiera entusiasmado	I might have enthused
Tú	hubieras entusiasmado	you might have enthused
Él / Ella / Usted (Ud.)	hubiera entusiasmado	he/she might have enthused, you (formal) might have enthused
Nosotros (as)	hubiéramos entusiasmado	we might have enthused
Vosotros (as)	hubierais entusiasmado	you (plural) Spain might have enthused
Ellas / Ellos / Ustedes (Uds.)	hubieran entusiasmado	they might have enthused, you (plural) might have enthused

entusiasmar as an Imperative Affirmative Command

The imperative Affirmative commands are used to tell someone or a group of people what to do. We do not give commands in the 1st or 3rd person which is why yo, él, ella, ellos, and ellas have been removed for this tense.

entusiasmar is Regular when forming Imperative Affirmative Commands. 

Mostly we will give commands or tell someone we treat as (tú) what to do. Let’s learn how to conjugate that part first. 

To find the Affirmative Informal tú command of a verb follow these steps:

1. Find the tú form of the verb in the present tense. 
2. Take off the “s”
3. That will give you the affirmative informal command of a verb in the tú form. 

Reminders: Stem changing verbs should continue to have the change in the stem.

For example, The affirmative informal tú command of the verb entusiasmar  would be entusiasma. 

Let’s see the process:

1. Find the tú form of the verb in the present tense.  (entusiasmas)
2. Take off the “s”.  (entusiasma)
3. That will give you the affirmative informal command of a verb in the tú form.  (entusiasma)

To review how to use Affirmative informal (tú) commands watch my video: Click for Video 

Pronoun	Spanish	English
N/A	N/A	N/A
Tú	¡entusiasma!	enthuse!
Usted (Ud.)	¡entusiasme!	enthuse!
Nosotros (as)	¡entusiasmemos!	enthuse!
Vosotros (as)	¡entusiasmad!	enthuse!
Ustedes (Uds.)	¡entusiasmen!	enthuse!

entusiasmar as an Imperative Negative Command

The imperative Negative commands are used to tell someone or a group of people what NOT to do. We do not give commands in the 1st or 3rd person which is why yo, él, ella, ellos, and ellas have been removed for this tense.

entusiasmar is Regular when forming Imperative Negative Commands. 

Mostly we will give commands or tell someone we treat as (tú) what to do. Let’s learn how to conjugate that part first. 

To find the Negative Informal tú command of a regular verb follow these steps:

1. Start with No
2. Find the yo form of the verb in the present tense. 
3. Take off the “o”
4. Add -es if it’s an -ar verb or -as if it’s and -er or -ir verb.

To review how to use Negative informal (tú) commands watch my video: Click for Video 

Pronoun	Spanish	English
N/A	N/A	N/A
Tú	¡no entusiasmes!	Don’t enthuse!
Usted (Ud.)	¡no entusiasme!	Don’t enthuse!
Nosotros (as)	¡no entusiasmemos!	Don’t enthuse!
Vosotros (as)	¡no entusiasméis!	Don’t enthuse!
Ustedes (Uds.)	¡no entusiasmen!	Don’t enthuse!