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Conjugate stem changers in the preterite tense. Essential grammar #58. Stem changing infinitives. Stem changing infinitives are named for what they do– change in the stem. You are going to make some alteration of the stem before adding the verb endings.
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Conjugate stem changers in the preterite tense Essential grammar #58
Stem changing infinitives Stem changing infinitives are named for what they do– change in the stem. You are going to make some alteration of the stem before adding the verb endings. You will use the preterite endings you already know. The hardest part of stem changers is knowing which ones change and which ones don’t.
Stem changers There are 2 different ways a stem changing infinitive can change (2 categories). The first is ou. * This is not even close to what the present tense rules are. Read with care!
Stem changers The first category is ou. (This includes present tense oue, uue). There is unique information about this stem change. In order to stem change in the preterite, the infinitive must end –ir. If it ends in –ar or –er, it is not considered a stem changer in the preterite and will conjugate like a regular infinitive.
dormir = to sleep This is a stem changer in the preterite. First separate the stem from the infinitive ending. Dorm- is the stem. Make the stem change ou New stem dur- Put into box– In the present tense, it looks like a shoe. In the preterite tense, it looks like a sandal. Only the 3rd and 6th box make stem changes.
Stem changers The second category is ei. (This includes present tense changes eie and ei). perferir = to prefer is a stem changer. It is the same steps as dormir. *When there is more than one vowel that could possible make the change, choose the vowel closest to the verb ending.
Preferir = to prefer First separate the stem from the infinitive ending. prefer- is the stem. Make the stem change ei New stem prefier- Put into box– remember it will look like a sandal in the preterite. It will only change in the 3rd and 6th boxes.
Stem changers . servir = to serve is a stem changer. It is the same steps as preferir.
servir = to serve First separate the stem from the infinitive ending. serv- is the stem. Make the stem change ei New stem sirv- Put into box– remember it will look like a sandal. In the preterite, only the 3rd and 6th boxes show change.