Answer:
1. Yo pienso que sí.
Nosotros pensamos que sí.
2. Nosotros queremos volver.
Él quiere volver.
3. Ellos empiezan ahora.
Nosotros empezamos ahora.
4. Tú puedes jugar.
Yo puedo jugar.
Step-by-step explanation:
To complete the previous sentences, using the verbs that are, we must identify the narrator, the gender, the number and the time indicated by each sentence as the first step. This is very important to be able to logically conjugate the verbs, and that these have concordance with what is being expressed.