The verbs decir, seguir, conseguir and perseguir have an irregular first person singular (yo) form. There are a number of other common verbs that undergo this change. Stem-changing verbs in the present tense use the same endings as regular -ar, -er, and -ir verbs when conjugated, but undergo a vowel change in the last. In these forms, the conjugation ending not the stem is stressed. Students will know if a verb is a stem-changer because in the dictionary it will indicate if it is by having the stem change. There are three types of 'stem-changing' verbs: e ie ei oue.
Pedir (to ask for, order) and decir (to speak) are good examples.Īll verb forms change in the stem except nosotros and vosotros, which do not have stem vowels that are stressed. Stem-Changers have regular verb endings, the only difference is that the 'stem' or 'root' of the verb is going to have a small change. If the verb has a stressed "e" as the last stem vowel, it changes to "i". Some -ir verbs undergo a stem change in the present tense.
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