18.are

19.is

20.are

21.Are

----> Đối với số ít thì dùng tobe là "is" , số nhiều thì dùng "are"

Bài 2 : 

1.do

2.talks

3.go

4.lives

5.doesn't live

6.has/goes

7.play

8.doesn't study

9.aren't

10.has

11.have

12.Does/live

13.works

*Cấu trúc : Thì HTĐ : S + V(s/es/nm)....

                                   Do/Does + S + Vinf....?

Bài 1:

Kiến thức áp dụng:

`@` Are + You/ We/ They/ Số nhiều 

`@` Am + I

`@` Is + She/ He/ It/ Số ít

Đáp án tham khảo:

18. How old are you?

19. How old is she?

20. Who are they?

21. What time is it?

22. Are you in class 6?

Bài 2:

Để làm BT này cần nhớ cấu trúc thì HTĐ (Past simple): 

`-` Tobe: (+) S + Is/ Am/ Are                      `-` To do:  (+) S + Vs/ Ves

               (-) S + Is/ Am/ Are + not                             (-) S + don't/ doesn't + V

               (?) Is/ Am/ Are + S?                                      (?) Do/ Does + S + V ?

Đáp án tham khảo:

1. I often do morning exercises.

2. She always talks at class.

3. They go to school by bus every morning.

4. He lives in Ho Chi Minh City. 

5. He doesn't live in Ho Chi Minh City.

6. Lan has breakfast and goes to school at 6 a.m.

7. Sometimes, I play badminton.

8. She doesn't study on Friday.

9. My students aren't hard working.

10. He has a new haircut today.

11. I usually have breakfast at 7 : 00.

12. Does she live in a house?

13. My sister works in a bank.