2Stem-Changing VerbsThe stem of a verb is the part of the infinitive that is left after you take of the endings –er, ar, or –ir.For example, the stem of the the verb almorzar is almorz-.Stem-changing verbs have a change in their stem in all forms of the present tense EXCEPT FOR the nosotros (as) and vosotros (as) forms.
3e ie o ue e i There are three types of stem-changing verbs: e-ie/e-i/o-ue. Here are some of them….e iepensar = to thinkquerer = to wantperder = to loseentender = to understandpreferir = to prefero uealmorzar = to eat lunchpoder = to be able/canencontrar = to finddormir = to sleepvolver = to returne iservir = to servepedir = to orderseguir = to followcompetir = to compete
4Steps to conjugating a stem-changing verb Cross off AR/ER/ or IR from the infinitive.Write the pronouns (yo, tú, etc…)Change the stem to the changed stem in everything EXCEPT NOSOTROS AND VOSOTROS.4) Add the AR/ER/ or IR endings (depending on the type ofverb.5) Translate pronouns and all forms of the verb into English.Now you are done!!! If you did it correctly, the stem changed forms of the verb are shaped like a boot.
5Boot VerbsStem-changing verbs are sometimes referred to as “boot verbs”. This is because the forms of the verb that change the stem make the shape of a boot
6Poder – to be able/can (o-ue stem-changing verb) Yonosotros/astúvosotros/asél/ellaustedellos/ellas/ustedes
7Pedir – to order (e – i stem change) singularpluralYo pidonosotros/as pedimosTú pidesvosotros/as pedísél/ellausted pideellos/ellasustedes piden
9Vamos a practicar:Conjugate the following stem-changing verbs. When done, draw a boot around the ones that changed the stem (everything EXCEPT NOSOTROS/VOSOTROS)Remember – the er/ir/ar endings will remain the same as you have previously learned.E IE PENSAR = TO THINKE I SERVIR = TO SERVEO UE ALMORZAR = TO EAT LUNCH