The Spanish verb pensar (to think) is semi-regular since its stem changes in some forms in El Presente but it has the same regular endings as other regular ‑ar verbs:
yo | pienso |
tú | piensas |
él / ella / Ud. | piensa |
nosotros / nosotras |
pensamos |
vosotros / vosotras |
pensáis |
ellos / ellas / Uds. | piensan |
The first vowel -e- in the stem becomes -ie- except for the nosotros and vosotros forms.
Look at and listen to these examples:
See also:
Verb list: Stem-changing (e > ie) verbs in the present tense
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