2. He is kicking the ball

    He's kicking the ball

3. They are dancing

    They're dancing

4. Lan is talking on the phone

    She's talking on the phone

5. The boy is jumping over the fence

    He's jumping over the fence

6. Mr.Tan is working in the garden

    He's working in the garden

7. The students are running

    They're running

8. I am doing my homework

    I'm doing my homework

IV.

1. she is         6. he isn't           11. she isn't

2. he is           7. they are         12. he isn't

3. it isn't         8. they aren't     13. he is

4. they are      9. he is               14. she isn't

5. she isn't      10. they are        15. he/she isn't

V.

1. is                   6. is studying/ are talking

2. are                7. have/ is

3. has                8. is...doing/ is cooking 

4. gets/goes      9. is he doing/ is reading

5. have              10. do have/ have