1)
1 He could run fast/ He will be able to run fast
2 You had to / will have to be more attentive at the lessons
3 She might work in her room / She will be allowed to work in her room
2)
1 Do you have to call a doctor? Why do you have to call a doctor? You have to call a doctor, don't you? Do you have to call a doctor or a vet?
2 Did they sing many songs? When did they sing many songs? They sang a lot of songs, didn't they? Did they sing many songs at the stage or at home?
3 Does he always do what you tell him? Why doesn't he do what you tell him? He never does what you tell him, does he? Does he always or sometimes do what you tell or him?
3)
1 You have just put
2 He will have brought
3 Thomas came, he had spent
4 He often helps me
5 went
6 While the teacher was giving a lesson, a small dog walked
7 will arrive
8 What are you doing with this room?
9 The sun will be rising