How do you know when you do and dont stem change in preterite

Question

gelidium · Answer

-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. cerrar cerré cerraste cerró cerramos cerrasteis cerraron entender entendí entendiste entendió entendimos entendisteis entendieron -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. preferir preferí preferiste prefirió preferimos preferisteis prefirieron dormir dormí dormiste durmió dormimos dormisteis durmieron This link can help you more. http://www.studyspanish.com/verbs/lessons/pretstem.htm

anonymous · Answer

Study your vocab on the go. http://www.sixtyvocab.com/site/spanish/