1. he is not doing his homework

2. they aren't playing tennis

3. linda's not having breakfast now

4. steve's not sleeping

5. we're not listening to the teacher

6. it's not rainning

7. the students aren't doing morning exercises

8. she's not interviewing some students

Ex2

1. is play ( playing football: đag chơi bóng đá)

2. play ( chơi)

3. help ( giúp)

4. help 

5. have

6. go ( đi)

7. go

8. goes

I

1. He isn't doing his homework

2. They aren't playing tennis

3. Linda's not having breakfast now

4. Steve's not sleeping

5. We're not listening to the teacher

6. It's not raining

7. The students aren't doing morning exercise

8. She isn't interviewing some students

Công thứ thì hiện tại tiếp diễn

+) S + is/am/are + Ving

-) S + is/am/are + not + Ving

?) Is/am/are + S + Ving

Trong đó

Are not = Aren't

Is not = isn't

II

1. play

2. play

3. help

4. help

5. have

6. have

7. go

8. go