Question

Can some one Explain how to conjugate pretitive stemchanging verbs? Will give medal.

Answer 1

This website page will help you a lot. http://www.studyspanish.com/verbs/lessons/pretstem.htm Look at their examples:

-AR Verbs (cerrar - to close)
YO cerré - I closed
TU cerrASTE - YOU (informal*) closed
EL/ELLA cerró - HE/SHE closed
USTED cerró - YOU (formal**) closed
NOSOTROS cerrAMOS - WE closed
VOSOTROS cerrASTEIS
ELLOS/ELLAS cerrARON - They closed
USTEDES cerrARON - YOU GUYS closed

-ER Verbs (entender - to understand)
Yo entendí
Tu entendISTE
El/Ella entendió
Usted entendió
NOSOTROS entendIMOS
VOSOTROS entendISTEIS
ELLOS/ELLAS entendIERON
USTEDES entendierON

Answer 2

"-ar and -er verbs that change their stem in the present tense do not change in the preterite. They are conjugated just like other regular preterite verbs, using the regular endings." - StudySpanish

Answer 3

"-ir verbs that change their stem in the present tense do change in the preterite, but in a different way. They change e:i and o:u in the third person, singular and plural." - StudySpanish

Answer 4

So look at these two -IR Examples:

preferir (to prefer)
YO preferí
TU preferiste
EL/ELLA/USTED prefirió <--Look how the e turned into i.
NOSOTROS preferimos
VOSOTROS preferisteis
ELLOS/ELLAS/USTEDES prefirieron <--See how the e turned into i.

dormir (to sleep)
YO dormí
TU dormiste
EL/ELLA durmió <--Look how the o turned into u
NOSOTROS dormimos
VOSOTROS dormisteis
ELLOS/ELLAS/USTEDES durmieron < The o turned to u.

Answer 5

Okay, I have to take a bath. ;O
E-Mail me at dariusordylan555@hotmail.com for any other help.

Answer 6

ok