Công thức thì HTTD 

(+) S + am/is/are + Ving 

(-) S + am/is/are + not + Ving 

(?) Am/Is/Are +S +Ving? 

I + am

S số ít, he, she, it + is

S số nhiều, you ,we, they + are

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

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1. am reading 

DHNB: right now 

2. are playing 

3. is studying 

DHNB: at the moment 

4. are watching 

DHNB: tonight 

5. is eating 

DHNB: today 

6. are playing 

DHNB: at the moment 

7. are traveling 

DHNB: next month 

8. is practicing / practise (vì đề yêu cầu HTTD nên chia is practicing chứ DHNB là thì HTĐ nhé) 

DHNB :every day (HTD) 

S số ít + Vs/es

9. are having 

DHNB: tomorrow morning 

10. is chasing 

11. are cleaning 

12. am writing 

DHNB: right now 

13. is taking 

14. are visiting 

15. is playing 

16. are preparing 

DHNB: tonight 

17. is dancing 

DHNB: at the moment 

18. are planting 

DHNB: this weekend 

19. is explaining 

DHNB :right now 

20. are waiting 

`color{orange}{~MiaMB~}`

1. am reading

2. are playing

3. is studying

4. are watching

5. is eating

6. are playing

7. are travelling

8. is practicing

9. are having

10. is chasing

11. arer cleaning

12. am writing

13. is taking

14. are visiting

15. is playing

16. are preparing

17. is dancing

18. are planting

19. is explaining

20. are waiting

______________________

`@` HTTD: (+) S + am/is/are + V_ing + O
`-` You /  we / they/ DTSN + are

`-` He/ she / it/ DTSI  + is

`-` I + am.