Ответ:

Task 1.

1. don't have
2. must
3. didn't have
4. do you have to
5. had to
6. Did you have to
7. shouldn't
8. mustn't

Task 2.

1. shouldn't go
2. you have to
3. may not (might not)
4. should talk
5. mustn't go

Task 3.

2- g

3- a

4- d

5- j

6- c

7- f

8- e

9- b

10- h

Task 4.

1- might

2-can't

3- must

4- must

5- can't

6- can't

7- might/ must- в зависимости от того, что подразумевал автор