Công thức thì HTĐ (V: tobe)

(+) S + am/is/are ..

(-) S + am/is/are + not .. 

(?) Am/Is/Are + S + ... ? 

I + am

S số ít, he, she, it + is

S số nhiều, you ,we, they + are

Công thức thì HTĐ (V: thường)

S số ít, he, she, it 

(+) S + Vs/es

(-) S+ doesn't + V1 

(?) Does +S +V1?

S số nhiều, I, you, we, they

(+) S + V1 

(-) S+ don't + V1 

(?) Do + S+ V1? 

DHNB: always, usually, sometimes, often, never, seldom,....

Công thức thì HTTD 

(+) S + am/is/are + Ving 

(-) S + am/is/are + not + Ving 

(?) Am/Is/Are +S +Ving? 

DHNB: now, right now, (!), at present, at the moment,.....

------------------------------------------------------------

9. are doing 

10. has to 

11. are flying 

DHNB: Look! (HTTD)

12. go 

DHNB: every day (HTD)

13. is singing 

DHNB: Listen! (HTTD)

14. play / are playing

DHNB: every afternoon (HTD), now (HTTD)

15. brushes / is brushing 

DHNB: every morning (HTD), now (HTTD)

16. is playing 

DHNB: Listen! (HTTD)

17. is 

DHNB: now (HTTD)

tobe ở thì HTTD chia theo tobe ở thì HTĐ

18. is having 

19. is watching / watches

20. are doing 

DHNB: now (HTTD)

`color{orange}{~MiaMB~}`