viết 30 động từ chuyển sang HTTD

1. play – playing 

2. study – studying

3. watch – watching 

4. read – reading

5. speak – speaking

6. talk – talking 

7. paint – painting 

8. wash – washing 

9. skate – skating 

10. swim – swimming 

11. listen – listening 

12. eat – eating

13. drink – drinking 

14. walk – walking

15. work – working

16. do – doing

17. say – saying

18. go – going

19. run – running

20. sit – sitting 

21. dance – dancing 

22. cook – cooking 

23. sing – singing

24. draw – drawing 

25. surf – surfing

26. ride – riding 

27. have – having

28. water – watering

29. buy – buying

30. teach – teaching