1. what do you want to see when we go to the theater?
2. where do we have to buy the entrance?
3. can you understand a movie in Spanish?
4. what do you want to see when we go to the museum?
5. what does the painter paint?
This is how your sentences will look: (Given that they are in present tense)
Usted quiere un gato.
Mis hermanas visitan a mis padres.
Tu necesitas unas vacaciones para. Descansar y relajarse.