1. fill in the blank in the following dialogue with the appropriate preterite form of the verb estudiar.

- ? por cuanto estudiaste ayer?
- ayer yo por dos horas.

Ayer to estudié por dos horas.

The correct answer is estudié.

Explanation:

In most cases when we have a question, we must answer it with the same verb.

In this case it is the verb estudiar (to study), conjugated in the past simple. The simple past is used to indicate an action that started and ended at a specific time in the past (in this case: yesterday).

Next I will conjugate the verb estudiar in the past tense for each person in Spanish:

yo estudié

tú estudiaste

él estudió

nosotros estudiamos

vosotros estudiasteis

ellos estudiaron