Spanish has two kinds of verbs that undergo spelling changes during
conjugation. Spelling change verbs undergo consonant changes in certain
conjugations, while stem-changing verbs are
characterized by changes in vowels. Stem-changing verbs are those that have a
vowel spelling change in the stem of all forms except nosotros and vosotros.
The endings for stem-changing verbs are the same as for regular
-ER, and -IR verbs, so
you should make sure that you understand those conjugations before working
on this lesson.
Spanish has three different stem-changing patterns:
1. E changes to IE
QUERER - to want
Similarly-conjugated verbs (note that there are -AR,
-ER, and -IR
verbs in this category):