Section 4 - Irregular verbs, yo-go/zco verbs and stem-changing verbs
Irregular verbsThe two verbs meaning 'to be', ser and estar, are both simply irregular (ser moreso than estar):
ser - to be
yo soy - I am
______________________nosotros somos - we are
tú eres - you are
___________________vosotros sois - you(pl.) are
él/ella/usted es - he/she/you are(is)
____ellos/ellas/ustedes son - they/you(pl.) are
estar - to be
yo estoy - I am
______________________nosotros estamos - we are
tú estás - you are
____________________vosotros estáis - you(pl.) are
él/ella/usted está - he/she/you are(is)
____ellos/ellas/ustedes están - they/you(pl.) are
Note: Estar is used to describe a current state of being (esp. emotions) that could change soon (such as estar triste - to be sad), the present participle (estoy comiendo - I am eating) and for location (él está en baño - he's in the bathroom). Ser is used to state what something is (¡es una trampa! - it's a trap!), describe physical or personality traits about someone (él es delgado - he is thin, ella es amable - she is friendly/kind) and to tell the time (es la una - it's 1:00, son las cinco - it's 5:00).
ir - to go
yo voy - I go
______________________nosotros vamos - we go
tú vas - you go
____________________vosotros vais - you(pl.) go
él/ella/usted va - he/she/you go(es)
____ellos/ellas/ustedes van - they/you(pl.) go
dar - to give
yo doy - I give
______________________nosotros damos - we give
tú das - you give
____________________vosotros dais - you(pl.) give
él/ella/usted da - he/she/you give(s)
____ellos/ellas/ustedes dan - they/you(pl.) give
haber - to have (auxiliary; for 'to have' as in 'have in one's possession', see tener)
yo he - I have
________________________nosotros hemos - we have
tú has - you have
_____________________vosotros habéis - you(pl.) have
él/ella/usted ha - he/she/you have(has)
____ellos/ellas/ustedes han - they/you(pl.) have
Yo-go and yo-zco verbsWhat I call a yo-go verb is a verb that tacks a -go onto the stem of a verb in the yo form.
EX:
salir {go} - to leave
yo sal
go - I leave
_______________________nosotros salimos - we leave
tú sales - you leave
_____________________vosotros salís - you(pl.) leave
él/ella/usted sale - he/she/you leave(s)
_____ellos/ellas/ustedes salen - they/you(pl.) leave
hacer {go} - to make/do
yo ha
go - I make
________________________nosotros hacemos - we make
tú haces - you make
_____________________vosotros hacéis - you(pl.) make
él/ella/usted hace - he/she/you make(s)
_____ellos/ellas/ustedes hacen - they/you(pl.) make
Other yo-go verbs: poner (to put, place) - pongo
Yo-zco verbs do the same type of thing, only tacking on -zco.
conocer {zco} - know/be familiar with (a noun)
yo cono
zco - I know
______________________nosotros conocemos - we know
tú conoces - you know
____________________vosotros conocéis - you(pl.) know
él/ella/usted conoce - he/she/you know(s)
____ellos/ellas/ustedes conocen - they/you(pl.) know
ofrecer {zco} - to offer
yo ofre
zco - I offer
______________________nosotros ofrecemos - we offer
tú ofreces - you offer
____________________vosotros ofrecéis - you(pl.) offer
él/ella/usted ofrece - he/she/you offer(s)
____ellos/ellas/ustedes ofrecen - they/you(pl.) offer
Other yo-zco verbs: crecer (to grow) - crezco, acrecer (to increase) - acrezco, adolecer (to suffer) - adolezco, abastecer (to supply) - abastezco, aborrecer (to abhor) - aborrezco, agradecer (to thank) - agradezco
Stem-changing verbsThese verbs change a vowel or two in their stems during present-tense conjugation in all forms BUT the nosotros/vosotros forms. There are a few types of changes: e-ie, e-i, u-ue and o-ue.
pensar {ie} - to think
yo p
ienso - I think
_______________________nosotros pensamos - we think
tú p
iensas - you think
____________________vosotros pensáis - you(pl.) think
él/ella/usted p
iensa - he/she/you think(s)
____ellos/ellas/ustedes p
iensan - they/you(pl.) think
pedir {i} - to order/ask for
yo p
ido - I order
_______________________nosotros pedimos - we order
tú p
ides - you order
____________________vosotros pedís - you(pl.) order
él/ella/usted p
ide - he/she/you order(s)
____ellos/ellas/ustedes p
iden - they/you(pl.) order
jugar {ue} - to play [games and sports]
yo j
uego - I play
_______________________nosotros jugamos - we play
tú j
uegas - you play
____________________vosotros jugáis - you(pl.) play
él/ella/usted j
uega - he/she/you play(s)
____ellos/ellas/ustedes j
uegan - they/you(pl.) play
dormir {ue} - to sleep
yo d
uermo - I sleep
_______________________nosotros dormimos - we sleep
tú d
uermes - you sleep
____________________vosotros dormís - you(pl.) sleep
él/ella/usted d
uerme - he/she/you sleep(s)
____ellos/ellas/ustedes d
uermen - they/you(pl.) sleep
The verbs tener (to have) and venir (to come) are actually double-whammies; they're both stem-changing verbs
and yo-go verbs. When you have a verb like this, the yo form puts on the -go, but its stem doesn't change with the rest of them.
tener {ie, go} - to have (in one's possession - for auxiliary 'to have', see haber)
yo ten
go - I have
_________________________nosotros tenemos - we have
tú t
ienes - you have
______________________vosotros tenéis - you(pl.) have
él/ella/usted t
iene - he/she/you have(has)
____ellos/ellas/ustedes t
ienen - they/you(pl.) have
venir {ie, go} - to come
yo ven
go - I come
_______________________nosotros venimos - we come
tú v
ienes - you come
____________________vosotros venís - you(pl.) come
él/ella/usted v
iene - he/she/you come(s)
____ellos/ellas/ustedes v
ienen - they/you(pl.) come