Contesta, por favor:
Conjugating stem-changing verbs is almost as simple as doing regular verbs, except the stem of these verbs has a change. Just so you know, the "stem" is that part of the verb that is left after you drop the infinitive ending (AR, ER or IR). Another important note is that anytime a stem has a change, it is always in its (the stem's) last syllable.
I cannot answer why some verbs are stem-changing and others not, but you do need to know the common ones that are. But how do you know if a verb is stem-changing or not? There are a number of words you already know that are stem-changing, and hopefully there will be a lot more after studying this lesson. Also, a number of texts, glossaries and dictionaries label stem changes by showing the possible change in brackets , such as [ie] or [ue]. So let's look at how they are conjugated, then you can get some lists at studyspanish.com.
The endings of stem-changing verbs are the same as the regular present tense, so that part is easy. The only thing you have to worry about is what the change may be. You should also make a note that these changes never occur in the nosotros and vosotros forms in the present tense.
Go to the studyspanish.com page for o to ue changes. Read the information and copy the list of common verbs into your notebook. Choose ten of these verbs and for each of these write a sentence in the "YO" form and another in the "... (somebody) Y YO"(=nosotros, ¿verdad?) form. Do the quiz and the oral activity, then take the test.
Do as you did, exactly as above, at studyspanish.com for this section of stem- changing verbs.
You know what to do at studyspanish.com, ¿verdad?
There are some other changes that you should also be aware of besides these common ones. So follow along and look at these.
(to laugh): río,
ríes, ríe, reímos,
sonreír (to smile): sonrío, sonríes, sonríe, sonreímos, sonreís, sonríen
This change occurs in some verbs that end in IAR:
enviar (to send): envío, envías, envía, enviamos, enviáis, envían
verbs like enviar: confiar [en] (to rely on, to confide in); espiar (to spy); fiarse [de] (to trust); guiar (to guide); resfriarse (to catch a cold); variar (to vary)
actuar (to act): actúo, actúas, actúa, actuamos, actuáis, actúan
(to continue); graduarse
This change will occur in all verbs that end in uir, except for those that end in -guir. Why don't we include "-guir" verbs in this category? Hypothesize, then check.
construir (to build, construct): construyo, construyes, construye, construimos, construís, construyen
verbs like construir:
concluir (to conclude); contribuir (to contribute); destruir (to destroy); distribuir (to distribute); huir (to flee, run away from); incluir (to include); sustituir (to substitute)
Since there are no specific activities for these verbs at studyspanish.com, you should do the following for practice:
Contesta las preguntas
siguientes con frases completas.
In -guir verbs, the "u" serves only to keep the hard "g" sound. Therefore, it is not "it's own letter", and cannot be treated like words in which it is. Got it?