12. They have two balls.

13. My class has thirty students

14. My father sometimes drives a car

15. Does your school has two floors?
16. Do you often eat breakfast at 6:20 ?

17. Hoa often brushes her teeth at 5:35

18. Hoa lives in Tran Phu Street

19. She is washing her face now. Please wait her

20. Look! The dog is swimming in the river

Cấu trúc:
- Ngôi thứ ba số ít + has  : he,she,it,Nam,a cat,...

- Ngôi thứ nhất,ngôi thứ hai, ngôi thứ 3 số nhiều + have : I,we,they,you

- Thì hiện tại đơn : S + V(s/es) + O 

- Thì hiện tại tiếp diễn : S + am/are/is + Ving + O 

`-` Thì HTĐ ( `12 - 18` ) :

`+` KĐ : S + Vs / es

`+` PĐ : S + don't / doesn't + V

`+` NV : Do / Does + S + V ?

`=>` `DHNB` : usually , sometimes , often , always , every , seldom , ...

`=>`

`+` I , You , We , They `+` V-inf `-` don't V-inf

`+` He , She , It `+` Vs / es `-` doesn't V-inf

`-` Thì HTTD ( `19 , 20` ) :

`=>` S + is / am / are + V-ing

`=>` `DHNB` : now , Look ! , at the moment , at present , ....

`=>`

`+` I `+` am ( not )

`+` He , She , It `+` is ( not )

`+` You , We , They `+` are ( not )

`12`.have

`13`.has

`14`.drives

`15`.have

`16`.eat

`17`.brushes

`18`.lives

`19`.is washing

`20`.is swimming

`\text{# TF}`