`- KĐ : `

`+ HTĐ : `

`-` I am a student . 

`+ HTTTTD: `

`-` I am watching TV.

`+ HTHT: `

`-` I have had `3` tasks since last month .

`+ QKĐ: `

`-`  He went out with his friend last week .

`- PĐ: `

`+ HTĐ:`

`-` She doesn't listen to music .

`+ HTTTTD:`

`-` They aren't watching TV .

`+ HTHT:`

`-` I haven't cleaned the floor yet .

`+ QKĐ:`

`-` She didn't go to to the cinema last year .

`- NV:`

`+ HTĐ:`

`-` Is she a student ?

`+ HTTTTD:`

`-` Are they student English ?

`+ HTHT:`

`-` Has he come yet ?

`+ QKĐ:`

`-` Did you go to school yesterday ?

Thì hiện tại đơn :

`(+)` She likes reading book.

`(-)` She doesn't likes reading book.

`(?)` Does she reads book ?

Thì hiện tại tiếp diễn:

`(+)` He is playing with friend.

`(-)` He isn't playing with friend.

`(?) Is he playing with friend ?

Thì hiện tại hoàn thành:

`(+)` He has a family since 2 years ago.

`(-)` He hasn't a family since 2 years ago.

`(?)` Has he a family since 2 years ago? 

Thì quá khứ đơn:

`(+)` I went to Ha Long Bay for `2` years ago.

`(-)` I didn' went to a Long Bay for `2` years ago.

`(?)` Did I go to Ha Long Bay for `2` years ago ? 

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