Ответ:

1.What you have to buy for school?

2.What he had to started work?

3.What your sister had to studied at school?

4.What our class have to do for homework?

5.Why we have to leave now?

6.Where I have to bought the tickets?

7.When we have to come home?

Объяснение:

коли ми пишемо речення з have to то воно пишеться: ....have to+Ved/3н.ф.д.

Ответ:

1 What do you have to buy for school?

2 When does he have to start work?

3 What does you sister have to study at school?

4 What do our class have to do for homework?

Здесь я предположил что класс - это группа людей, поэтому подвязываю под вспомогательный "Do"

5 Why do we have to leave now?

6 Where do I have to buy the tickets?

7 When do we have to come?

Объяснение: