1. drawing (enjoy + V-ing)

2. learns (in her free time: HTĐ; Mai là CN số ít ⇒ V thêm -s,-es)

3. are - are studying 

4. plays - is playing (now: HTTD: am - is - are + V-ing)

5. stay (should (not) + do s.th)

6. collecting (fancy + doing s.th)

7. will be (next year: TLĐ)

8. go (Let's do s.th)

9. to do/doing (like + to do s.th - doing s.th)

10. will be

11. is having

12. gets (each year: HTĐ)

13. playing (adore doing s.th)

14. will have (soon: TLĐ)

15. review (must do s.th)

16. is riding (Look!: HTTD)

17. show (can - could - be able to + do s.th)

18. to buy (would like to do s.th)

19. to send (want to do s.th)

20. to visit (would love to do s.th)

21. taught (five years ago: QKĐ)

22. haven't seen (since + mốc thời gian: HTHT)

1. drawing (enjoy + V_ing)

2. learns (in her free time: HTĐ; Mai là CN số ít `->` V thêm -s,-es)

3. are - are studying 

4. plays - is playing (now: HTTD: am/is/are + V_ing)

5. stay (should (not) + do s.th)

6. collecting (fancy + doing s.th)

7. will be (next year: TLĐ)

8. go (Let's do s.th)

9. to do/doing (like + to do s.th/doing s.th)

10. will be

11. is having

12. gets (each year: HTĐ)

13. playing (adore doing s.th)

14. will have (soon: TLĐ)

15. review (must do s.th)

16. is riding (Look!: HTTD)

17. show (can/could/be able to + do s.th)

18. to buy (would like to do s.th)

19. to send (want to do s.th)

20. to visit (would love to do s.th)

21. taught (five years ago: QKĐ)

22. haven't seen (since + mốc thời gian: HTHT)

`III`.

1. studies - will pass (If1: If + S + V(s,es), S + will + V(inf)