HTD 

+) S+ Vs/es 

-) S + don't / doesn't + V 

?) Do / does + S + V ? 

I/ you / we / they + V ; do 

She / he / it + Vs/es ; does

---------------

`\text{1. listen }`

`\text{2. have }`

`\text{3. like }`

`\text{4. watch }`

`\text{5. want }`

`\text{6. likes }`

`\text{7. has }`

`\text{8. need }`

`\text{9. likes }`

`\text{10. plays}`

------------------------

HTD ( dạng phủ định ) 

-) S+ do / does + not + V

I/ you / we / they + don't 

She / he / it + doesn't 

---------------------

`\text{11. don't watch }`

`\text{12. don't like }`

`\text{13. don't work }`

`\text{14. don't listen }`

`\text{15. don't have }`

`\text{16. doesn't have }`

`\text{17. doesn't do }`

`\text{18. doesn't go }`

`\text{19. doesn't like }`

`\text{20. doesn't do exercise}`

a. 1) listens

    2) have 

    3) likes 

    4) watchs

    5) want 

    6) likes 

    7) has

    8) need 

    9) likes 

   10) plays 

b. 11) don't 

12) don't 

13) are don't work 

14) don't listens

15) don't have 

16) doen't have 

17) doen't do 

18) doen't go 

19) doen't like 

20) doen't do exercise