* Cấu trúc thì Hiện tại đơn 

(+) S + V(es/s)/ V

(-) S + don't/ doesn't + V 

(?) Do/ Does + S +V?

- DHNB: every, often,...

* Cấu trúc thì HTTD

+) S + be + V-ing 

-) S + be not + V-ing 

?) Be + S + V-ing?

- DHNB: now,..

* Cấu trúc thì quá khứ đơn 

(+) S +V (ed/ cột 2) 

(-)  S + didn't + V 

(?) Did + S + V?

- DHNB: ago, last,..

`2.` likes 

`3.` has 

`4.` is studying 

`5.` is looking 

`6.` play 

`7.` sleeps

`8.` is doing 

`9.` stay - read 

`10.` raining 

`11.` visited 

`12.` discovers 

`13.` haven't started 

- yet: thì HTTD 

S + have/has + V-pp

`14.` doing 

- S + hate + V-ing 

`15.` goes 

2. Likes

3. Has

4. Đúng

5. Đúng

6. Are playing

7. Is sleeping

8. Đúng

9. Am staying - reading

10. Đúng

11. Đúng

12. Was discovered

13. Đúng

14. Đúng

15. Đúng