Ответ:

1.

1.Has to

2.has to

3.Have to

4.have to

5.have to

2.

1.Do you have to go to the school at the weekends?

2.Why are you going to the mobile market?

3.How long will the travel last?

4.When does he finish school?

5.When she had to to work very hard?

3.

1.You have to practice the violin every day

2 You have to wear a uniform to school

3.You had to walk on crutches every day