16. fill in the blank with the correct conjugation of the verb in parentheses. (estudiar) por la tarde.

The correct verb conjugation would be estudiamos.

When you conjugate a verb, you look at the ending of the verb, and who or what you are talking about. Here are the conjugations of words based off of their ending. Please keep in mind, these don't work for all verbs (Ser, Tener, Ir). To get the conjugations, you drop the "AR", "ER", or "IR" endings before adding the new ending.

I (Yo): Add an "o" to the end.

You (Tú): Add "as" for "AR" verbs, or "es" for "ER" and "IR" verbs.

He, she, you, it (Él, ella, usted): Add "a" for "AR" verbs or "e" for "ER" and "IR" verbs.

We (nosotros): Add "amos" for "AR" verbs, "emos" for "ER" verbs, and "imos" for "IR" verbs.

They, you all (Ellos, ellas, ustedes): Add "an" for "AR" verbs, and "en" for "ER" and "IR" verbs.

Thus meaning estudiamos is your answer. I hope this helps!