Question

a verb that does not follow regular conjugation patterns and must often be memorized, e.g., ir -> voy.
a verb where the e in the stem changes to i in most forms, e.g., pedir -> pido.
a verb where the e in the stem changes to ie in most forms, e.g., empezar -> empiezo.
a verb that has an irregular conjugation in the yo form, e.g., tener -> tengo.
a verb where the o in the stem changes to ue in most forms, e.g., dormir -> duermo.
e-i stem changing verb
o-ue stem changing verb
e-ie stem changing verb
irregular verb
irregular yo form

Explanation:

To solve this matching problem, we analyze each term and its corresponding definition:

1. e - i stem changing verb: The definition "A verb where the e in the stem changes to i in most forms, e.g., pedir -> pido" matches this. Because in the verb "pedir", the stem "ped - " (from "pedir") has the "e" change to "i" in most forms (like "pido" from "pedir" in the yo form, and other forms follow similar stem - changing logic).
2. o - ue stem changing verb: The definition "A verb where the o in the stem changes to ue in most forms, e.g., dormir -> duermo" is correct. In "dormir", the stem "dorm - " has the "o" change to "ue" in forms like "duermo" (yo form of "dormir") and other relevant forms.
3. e - ie stem changing verb: The definition "A verb where the e in the stem changes to ie in most forms, e.g., empezar -> empiezo" fits. For "empezar", the stem "empez - " has the "e" change to "ie" in forms like "empiezo" (yo form) and other forms.
4. irregular verb: The definition "A verb that does not follow regular conjugation patterns and must often be memorized, e.g., ir -> voy" is appropriate. "Ir" is a verb that has a completely irregular conjugation pattern and needs to be memorized as it doesn't follow the regular - ar, - er, - ir verb conjugation rules.
5. irregular yo form: The definition "A verb that has an irregular conjugation in the yo form, e.g., tener -> tengo" is correct. "Tener" has an irregular conjugation only in the yo form ( "tengo" instead of the regular - er verb conjugation in the yo form which would be something like "teno" if it were regular, but it's irregular here).

Answer:

• e - i stem changing verb: A verb where the e in the stem changes to i in most forms, e.g., pedir -> pido.
• o - ue stem changing verb: A verb where the o in the stem changes to ue in most forms, e.g., dormir -> duermo.
• e - ie stem changing verb: A verb where the e in the stem changes to ie in most forms, e.g., empezar -> empiezo.
• irregular verb: A verb that does not follow regular conjugation patterns and must often be memorized, e.g., ir -> voy.
• irregular yo form: A verb that has an irregular conjugation in the yo form, e.g., tener -> tengo.