Answer:

Ex 1:

1. went

2. played

3. ate

4. took

5. had

6. bought

7. didn't talk

8. didn't come

Ex 2;

1. am not

2. doesn't study

3. are

4. have

5. Does (she) live

6. are (your children)

7. works

8. rains

9. fly

10. writes

Ex 3:

1. am watching

2. is swimming

3. is cooking

4. am not watching, am doing

5. is singing

6. Is (your brother) listening

7. is sleeping

8. is writing

9. is playing

10. is studying

EX 1

1.went

2.played

3.ate

4.took

5.had

6.Did she buy

7.didn't talk

8.Tthey did't come

EX2

1.am not

2.don't study

3.are

4.have

5.Does she live

6.are your children

7.works

8.rains

9.fly

10.writes

EX3

1.am watching

2.is swimming

3.is cooking

4.am not watching/am doing

5.is singing

6.Is your brother listening

7.is sleeping

8.is writing

9.is playing

10.is studying