21. has just washed 

22. Are you staying

23. saw

24. had

25. have just gotten

26. are learning 

27. is going

28. feel

29. are studying

30. get/have

31. does it always rain

32. understands

33. draws

34. flies

*GT: - Cấu trúc HTĐ: 

(+) S + V (s/es)

(?) Do/Does + S + V-infinitive?

- Cấu trúc QKĐ: S + V-ed/VII

- Cấu trúc HTTD: (+) S + am/is/are + V-ing

                            (?) Am/Is/Are + S + V-ing?

- Cấu trúc HTHT: S + have/has + VII.

$\text{21. Just washing }$

$\text{22. Are you stay }$

$\text{23. See}$

$\text{24. Have }$

$\text{25. Have just get }$

$\text{26. are learning }$

$\text{27. goes}$

$\text{28. am feel }$

$\text{29. am studying }$

$\text{30. am getting/ have }$

$\text{31. do/ rains}$

$\text{33. draws}$

$\text{34. flies}$

$\text{32. understands}$