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Spanish Verb Conjugation: Indicative Mood: Present Tense
Present Tense: E -> I Stem-Changers

©RCAguilar

OBJECTIVE:
Think about how fun it's gonna be when you're sitting there on the beach in Acapulco speaking Spanish to everybody around you.
TASK:
Start saving up your money and making plans to visit another country.
PERPLEXED?
Anybody ever tell you that you're a reeeeeal homebody ... ?
Why is it called a stem-changing verb?
Stem-changing verbs are verbs that have some letter changes in their stems when being conjugated. The endings are the same as for regular verb conjugations.
The ending gets dropped off (in these cases the -ir), ... and endings get added on (see below), ... and off you go! Done! Finito! Ahem. But keep an eye on what happens to the stem!
Notice that the "nosotros" and "vosotros" forms usually aren't affected by stem changes.
Just do it your way! If you take the time to study, you can learn anything you want to learn. Then you can go out and conquer the universe!

 
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VERB CONJUGATION
Indicative Mood
Present Tense
Regular -ar Verbs
Regular -er Verbs
Regular -ir Verbs
Stem e -> ie
Stem o -> ue
Stem e -> i
Stem iar: i ->
Stem uar: u ->
Stem uir: i -> y
Stem ger/gir: g -> j
Yo form -oy
Yo form -zco
Yo form -go
Imperfect Tense
AR Verbs
ER & IR Verbs
Preterite Tense
Regular AR Verbs
Ending -car
Ending -gar
Ending -zar
ER/IR Verbs
ER/IR Verbs vowel Stem
IR Stem-changers
Irregular Stems
Future Tense
Regular Verbs
Irregular Stems
Conditional Tense
Regular Verbs
Irregular Stems
Progressive Tenses
Perfect Tenses

Start using 'em!
With Interrogatives
¿Cuándo?
¿Cuándo sirves?
When do you serve?
When are you serving?
 
¿Cuándo compite ella?
When does she compete?
When is she competing?
 
¿Cuándo desvisto?
When do I undress?
When am I undressing?
 
¿Por qué?
 
¿Por qué mido?
Why do I measure?
Why am I measuring?
 
¿Por qué pedimos?
Why are we making requests?
Why do we request?
 
¿Por qué compite él ?
Why is he competing?
Why does he compete?
 
 

Reference
Subject Pronouns
yo
nosotros
nosotras
tú*
vosotros
vosotras
él
ella
Usted
ellos
ellas
Ustedes
*In some countries in Central & South America vos is used instead of .

Reflexive Pronouns
me nos
te os
se  se

Direct Object Pronouns
me nos
te os
lo
la
lo/la
los
las
los/las

Indirect Object Pronouns
me nos
te os
le les
These are irregular verbs because they entail a stem change: E -> I
This stem-change only occurs in certain IR verbs: never occurs in AR or ER verbs!
IR
competir to compete konkurrieren
despedir to say goodbye verabschieden
desvestir to undress auskleiden
medir to measure messen
pedir to request, ask for bitten
servir to serve servieren, dienen
vestir to dress kleiden
In some forms the -e nearest the end of the stem becomes an -i.
Drop the -ir: That's the stem !!
To see the present tense conjugated forms of these verbs, click on a pronoun below:
The nosotros & vosotros forms do not require the stem change in the present tense.
YO
ÉL
ELLA
USTED
NOSOTROS
VOSOTROS
ELLOS
ELLAS
USTEDES

Present tense: Stem changing verbs: E -> I
Yo form
To make this form, drop the -ir from the end of the infinitive.
Look for the E nearest the end of the stem, and change it to I.
Add the normal ending for present tense conjugation.
deutsch
competir compito I compete I do compete I am competing
ich konkurriere
despedir despido I say goodbye I do say goodbye I'm saying goodbye
ich verabschiede
desvestir desvisto I undress I do undress I'm undressing
ich ziehe (mich) aus
medir mido I measure I do measure I'm measuring
ich messe
pedir pido I request I do request I am requesting
ich bitte
servir sirvo I serve I do serve I am serving
ich diene, serviere
vestir visto I dress I do dress I am dressing
ich ziehe mich an
What do they have in common now ?
The stem (verb minus IR) tells you the action.
Using the o ending says I am doing this action, and it's going on NOW.
Each verb form in Spanish matches a specific pronoun, so Spanish doesn't need to use the pronoun.
That means: each of the conjugated forms you see says ALL of the given "meaning."
The YO is understood, because of the ending.
You don't need to say YO. If you do add the YO, it usually adds emphasis, saying I dooo ...
A look at other forms:
YO
ÉL
ELLA
USTED
NOSOTROS
VOSOTROS
ELLOS
ELLAS
USTEDES
Back to Top

Present tense: Stem changing verbs: E -> I
form
To make this form, drop the -ir from the end of the infinitive.
Look for the E nearest the end of the stem, and change it to I.
Add the normal ending for present tense conjugation.
deutsch
competir compites you compete you do compete you're competing
du konkurrierst
despedir despides you say goodbye you do say goodbye you're saying goodbye
du verabschiedest
desvestir desvistes you undress you do undress you're undressing
du ziehst (dich) aus
medir mides you measure you do measure you're measuring
du meßt
pedir pides you request you do request you're requesting
du bittest
servir sirves you serve you do serve you're serving
du dienst, servierst
vestir vistes you dress you do dress you're dressing
du ziehst dich an
What do they have in common now ?
The stem (verb minus IR) tells you the action.
Using the -es ending says you are doing this action, and it's going on NOW.
Each verb form in Spanish matches a specific pronoun, so Spanish doesn't need to use the pronoun.
That means: each of the conjugated forms you see says ALL of the given "meaning."
The is understood, because of the ending.
You don't need to say . If you do add the , it usually adds emphasis, saying you dooo ...
A look at other forms:
YO
ÉL
ELLA
USTED
NOSOTROS
VOSOTROS
ELLOS
ELLAS
USTEDES
Back to Top

Present tense: Stem changing verbs: E -> I
Él form
To make this form, drop the -ir from the end of the infinitive.
Look for the E nearest the end of the stem, and change it to I.
Add the normal ending for present tense conjugation.
deutsch
competir compite he competes he does compete he's competing
er konkurriert
despedir despide he says goodbye he does say goodbye he's saying goodbye
er verabschiedet
desvestir desviste he undresses he does undress he's undressing
er zieht (sich) aus
medir mide he measures he does measure he's measuring
er meßt
pedir pide he requests he does request he's requesting
er bittet
servir sirve he serves he does serve he's serving
er dient, serviert
vestir viste he dresses he does dress he's dressing
er zieht sich an
What do they have in common now ?
The stem (verb minus IR) tells you the action.
Using the -e ending says he is doing this action, and it's going on NOW.
Each verb form in Spanish matches a specific pronoun, so Spanish doesn't need to use the pronoun.
That means: each of the conjugated forms you see says ALL of the given "meaning."
The ÉL is understood, because of the ending.
You don't need to say ÉL. If he does add the ÉL, it usually adds emphasis, saying he doooes ...
A look at other forms:
YO
ÉL
ELLA
USTED
NOSOTROS
VOSOTROS
ELLOS
ELLAS
USTEDES
Back to Top

Present tense: Stem changing verbs: E -> I
Ella form
To make this form, drop the -ir from the end of the infinitive.
Look for the E nearest the end of the stem, and change it to I.
Add the normal ending for present tense conjugation.
deutsch
competir compite she competes she does compete she's competing
sie konkurriert
despedir despide she says goodbye she does say goodbye she's saying goodbye
sie verabschiedet
desvestir desviste she undresses she does undress she's undressing
sie zieht (sich) aus
medir mide she measures she does measure she's measuring
sie meßt
pedir pide she requests she does request she's requesting
sie bittet
servir sirve she serves she does serve she's serving
sie dient, serviert
vestir viste she dresses she does dress she's dressing
sie zieht sich an
What do they have in common now ?
The stem (verb minus IR) tells you the action.
Using the -e ending says she is doing this action, and it's going on NOW.
Each verb form in Spanish matches a specific pronoun, so Spanish doesn't need to use the pronoun.
That means: each of the conjugated forms you see says ALL of the given "meaning."
The ELLA is understood, because of the ending.
You don't need to say ELLA. If he does add the ELLA, it usually adds emphasis, saying she doooes ...
A look at other forms:
YO
ÉL
ELLA
USTED
NOSOTROS
VOSOTROS
ELLOS
ELLAS
USTEDES
Back to Top

Present tense: Stem changing verbs: E -> I
Usted form
To make this form, drop the -ir from the end of the infinitive.
Look for the E nearest the end of the stem, and change it to I.
Add the normal ending for present tense conjugation.
deutsch
competir compite you compete you do compete you're competing
Sie konkurrieren
despedir despide you say goodbye you do say goodbye you're saying goodbye
Sie verabschieden
desvestir desviste you undress you do undress you're undressing
Sie ziehen (sich) aus
medir mide you measure you do measure you're measuring
Sie messen
pedir pide you request you do request you're requesting
Sie bitten
servir sirve you serve you do serve you're serving
Sie dienen, servieren
vestir viste you dress you do dress you're dressing
Sie ziehen sich an
What do they have in common now ?
The stem (verb minus IR) tells you the action.
Using the -e ending says you are doing this action, and it's going on NOW.
Each verb form in Spanish matches a specific pronoun, so Spanish doesn't need to use the pronoun.
That means: each of the conjugated forms you see says ALL of the given "meaning."
The USTED is understood, because of the ending.
You don't need to say USTED. If he does add the USTED, it usually adds emphasis, saying you dooo ...
A look at other forms:
YO
ÉL
ELLA
USTED
NOSOTROS
VOSOTROS
ELLOS
ELLAS
USTEDES
Back to Top

Present tense: Stem changing verbs: E -> I
Nosotros & Nosotras form
To make this form, drop the -ir from the end of the infinitive.
The nosotros form of these verbs is not affected, and follows the normal pattern for -ir verb conjugation.
deutsch
competir competimos we compete we do compete we're competing
wir konkurrieren
despedir despedimos we say goodbye we do say goodbye we're saying goodbye
wir verabschieden
desvestir desvestimos we undress we do undress we're undressing
wir ziehen (uns) aus
medir medimos we measure we do measure we're measuring
wir messen
pedir pedimos we request we do request we're requesting
wir bitten
servir servimos we serve we do serve we're serving
wir dienen, servieren
vestir vestimos we dress we do dress we're dressing
wir ziehen uns an
What do they have in common now ?
The stem (verb minus IR) tells you the action.
Using the -imos ending says we are doing this action, and it's going on NOW.
Each verb form in Spanish matches a specific pronoun, so Spanish doesn't need to use the pronoun.
That means: each of the conjugated forms you see says ALL of the given "meaning."
The NOSOTROS is understood, because of the ending.
You don't need to say NOSOTROS. If you do add the NOSOTROS, it usually adds emphasis, saying we dooo ...
A look at other forms:
YO
ÉL
ELLA
USTED
NOSOTROS
VOSOTROS
ELLOS
ELLAS
USTEDES
Back to Top

Present tense: Stem changing verbs: E -> I
Vosotros & Vosotras form
To make this form, drop the -ir from the end of the infinitive.
The vosotros form of these verbs is not affected, and follows the normal pattern for -ir verb conjugation.
deutsch
competir competís y'all compete y'all do compete y'all are competing
ihr konkurriert
despedir despedís y'all say goodbye y'all do say goodbye y'all are saying goodbye
ihr verabschiedet
desvestir desvestís y'all undress y'all do undress y'all are undressing
ihr zieht (euch) aus
medir medís y'all measure y'all do measure y'all are measuring
ihr meßt
pedir pedís y'all request y'all do request y'all are requesting
ihr bittet
servir servís y'all serve y'all do serve y'all are serving
ihr dient, serviert
vestir vestís y'all dress y'all do dress y'all are dressing
ihr zieht euch an
What do they have in common now ?
The stem (verb minus IR) tells you the action.
Using the -ís ending says y'all are doing this action, and it's going on NOW.
Each verb form in Spanish matches a specific pronoun, so Spanish doesn't need to use the pronoun.
That means: each of the conjugated forms you see says ALL of the given "meaning."
The VOSOTROS is understood, because of the ending.
You don't need to say VOSOTROS. If you do add the VOSOTROS, it usually adds emphasis, saying y'all dooo ...
A look at other forms:
YO
ÉL
ELLA
USTED
NOSOTROS
VOSOTROS
ELLOS
ELLAS
USTEDES
Back to Top

Present tense: Stem changing verbs: E -> I
Ellos form
To make this form, drop the -ir from the end of the infinitive.
Look for the E nearest the end of the stem, and change it to I.
Add the normal ending for present tense conjugation.
deutsch
competir compiten they compete they do compete they're competing
sie konkurrieren
despedir despiden they say goodbye they do say goodbye they're saying goodbye
sie verabschieden
desvestir desvisten they undress they do undress they're undressing
sie ziehen (sich) aus
medir miden they measure they do measure they're measuring
sie messen
pedir piden they request they do request they're requesting
sie bitten
servir sirven they serve they do serve they're serving
sie dienen, servieren
vestir visten they dress they do dress they're dressing
sie ziehen sich an
What do they have in common now ?
The stem (verb minus IR) tells you the action.
Using the -en ending says they are doing this action, and it's going on NOW.
Each verb form in Spanish matches a specific pronoun, so Spanish doesn't need to use the pronoun.
That means: each of the conjugated forms you see says ALL of the given "meaning."
The ELLOS is understood, because of the ending.
You don't need to say ELLOS. If he does add the ELLOS, it usually adds emphasis, saying they dooo ...
A look at other forms:
YO
ÉL
ELLA
USTED
NOSOTROS
VOSOTROS
ELLOS
ELLAS
USTEDES
Back to Top

Present tense: Stem changing verbs: E -> I
Ellas form
To make this form, drop the -ir from the end of the infinitive.
Look for the E nearest the end of the stem, and change it to I.
Add the normal ending for present tense conjugation.
deutsch
competir compiten they compete they do compete they're competing
sie konkurrieren
despedir despiden they say goodbye they do say goodbye they're saying goodbye
sie verabschieden
desvestir desvisten they undress they do undress they're undressing
sie ziehen (sich) aus
medir miden they measure they do measure they're measuring
sie messen
pedir piden they request they do request they're requesting
sie bitten
servir sirven they serve they do serve they're serving
sie dienen, servieren
vestir visten they dress they do dress they're dressing
sie ziehen sich an
What do they have in common now ?
The stem (verb minus IR) tells you the action.
Using the -en ending says they are doing this action, and it's going on NOW.
Each verb form in Spanish matches a specific pronoun, so Spanish doesn't need to use the pronoun.
That means: each of the conjugated forms you see says ALL of the given "meaning."
The ELLAS is understood, because of the ending.
You don't need to say ELLAS. If you do add the ELLAS, it usually adds emphasis, saying they dooo ...
A look at other forms:
YO
ÉL
ELLA
USTED
NOSOTROS
VOSOTROS
ELLOS
ELLAS
USTEDES
Back to Top

Present tense: Stem changing verbs: E -> I
Ustedes form
To make this form, drop the -ir from the end of the infinitive.
Look for the E nearest the end of the stem, and change it to I.
Add the normal ending for present tense conjugation.
deutsch
competir compiten you compete you do compete you're competing
Sie konkurrieren
despedir despiden you say goodbye you do say goodbye you're saying goodbye
Sie verabschieden
desvestir desvisten you undress you do undress you're undressing
Sie ziehen (sich) aus
medir miden you measure you do measure you're measuring
Sie messen
pedir piden you request you do request you're requesting
Sie bitten
servir sirven you serve you do serve you're serving
Sie dienen, servieren
vestir visten you dress you do dress you're dressing
Sie ziehen sich an
What do they have in common now ?
The stem (verb minus IR) tells you the action.
Using the -en ending says y'all are doing this action, and it's going on NOW.
Each verb form in Spanish matches a specific pronoun, so Spanish doesn't need to use the pronoun.
That means: each of the conjugated forms you see says ALL of the given "meaning."
The USTEDES is understood, because of the ending.
You don't need to say USTEDES. If he does add the USTEDES, it usually adds emphasis, saying you dooo ...
A look at other forms:
YO
ÉL
ELLA
USTED
NOSOTROS
VOSOTROS
ELLOS
ELLAS
USTEDES
Back to Top