Our topics for this session:
1. Conjugating the following -AR, -ER and -IR verbs
that have e to ie stem changes in the present tense:
- pensar
- querer
- preferir
2. Extrapolating from the rules that govern e to ie stem changing verbs and applying them to make o to ue stem changes correctly.
Remember, with stem-changing verbs, what makes them special is that, instead of leaving the stem alone after we derive it (by removing the -AR, -ER or -IR infinitive ending),
whenever the subject is NOT nosotros (or vosotros, but we won't use vosotros-forms in this course),
we change the stem vowel in a certain way.
Once that change is made, then we add the right conjugated ending for the sentence's subject.
As always, when conjugating, we're only concerned with 2 things:
- stem
- ending
For regular stem-changing verbs (like "pensar", "querer" and "preferir"), the only form that doesn't show a stem change is the nosotros-form:
infinitive: pensar
nosotros-form: pensamos
conjugated ending is "amos"
infinitive: querer
nosotros-form: queremos
conjugated ending is "emos"
infinitive: preferir
nosotros-form: preferimos
conjugated ending is "imos"
In the other 4 present-tense forms, the stem "e" has to change to an "ie" before we can add a conjugated ending.
Once that change is made, then we add the right conjugated ending for the sentence's subject.
The 4 forms of -AR verb "pensar" where the stem "e" changes to "ie" are:
tú form: piensas
changed stem is "piens"
conjugated ending is "as"
3rd-person singular: piensa
changed stem is "piens"
conjugated ending is "a"
3rd person plural: piensan
changed stem is "piens"
conjugated ending is "an"
yo form: pienso
changed stem is "piens"
conjugated ending is "o"
The 4 forms of -ER verb "querer" where the stem "e" changes to "ie" are:
tú form: quieres
changed stem is "quier"
conjugated ending is "es"
3rd-person singular: quiere
changed stem is "quier"
conjugated ending is "e"
3rd person plural: quieren
changed stem is "quier"
conjugated ending is "en"
yo form: quiero
changed stem is "quier"
conjugated ending is "o"
The 4 forms of -IR verb "preferir" where the stem "e" changes to "ie" are:
tú form: prefieres
changed stem is "prefier"
conjugated ending is "es"
3rd-person singular: prefiere
changed stem is "prefier"
conjugated ending is "e"
3rd person plural: prefieren
changed stem is "prefier"
conjugated ending is "en"
yo form: prefiero
changed stem is "prefier"
conjugated ending is "o"
All together, here are these 3 verbs in the present tense (conjugating really is just stem + ending):
- yo form (stem change): pienso, quiero, prefiero
- tú form (stem change): piensas, quieres, prefieres
- 3rd-person-singular form (stem change): piensa, quiere, prefiere
- nosotros form (never a stem change): pensamos, queremos, preferimos
- 3rd-person-plural form (stem change): piensan, quieren, prefieren
You can see these verbs and their conjugation paradigms on textbook pages 121-122.
Now we'll practice working with these e to ie stem-changing verbs, and with other verbs that stem change this way as well.
We'll be doing this via 2 different exercises--one that was assigned, and one that wasn't.
After we finish with the e to ie stem-changing verbs in these exercises, we'll go back and work on o to ue stem-changing verbs. The rules are the same for this type of verbs as for e to ie stem-changers. The only difference is the letters that change.
Live Session Makeup (NFC Spanish 1): Verbs that stem change e to ie and o to ue
By kjjones
Live Session Makeup (NFC Spanish 1): Verbs that stem change e to ie and o to ue
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