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,....

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5. eats 

DHNB: usually 

6. visit 

DHNB: once a month 

7. works 

8. like 

9. barks 

10. drinks 

11. don't stay 

12. don't wash 

13. doesn't do 

14. don't go 

15. doesn't open 

16. doesn't eat

17. doesn't chat 

18. doesn't use often 

DHNB: often 

19. don't often skate

DHNB: often  

20. doesn't always throw 

21. Do they go 

22. Does she often visit 

DHNB: often, on Sundays 

23. Do we usually have 

DHNB: usually 

24. Does your sister live 

25. Do you often read

DHNB: often 

26. Does your son sometimes play 

DHNB: sometimes 

27. Do the children always speak 

28. Do your friends sometimes play 

DHNB: sometimes, at weekend 

29. Do the volunteers work

30. Does the last train arrive 

`color{orange}{~MiaMB~}`