`-` Thì HTĐ :

`+` KĐ : S + Vs / es `-` S + is / am / are + adj / n

`+` PĐ : S + don't / doesn't + V `-` S + isn't / 'm not / aren't + adj / n

`+` NV : Do / Does + S + V `?` `-` Is / Am / Are + S + adj / n `?`

`=>` `DHNB` : always , usually , often , ...

`-` Thì HTTD :

`+` KĐ : S + is / am / are + V-ing

`+` PĐ : S + isn't / 'm not / aren't + V-ing

`+` NV : Is / Am / Are + S + V-ing ?

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

`9`.

`( - )` Tung and Hai aren't drawing pictures in their class

`( ? )` Are Tung and Hai drawing pictures in their class ?

`-` Yes , they are

`-` No , they aren't

`( Wh )` What are Tung and Hai doing in their class ?

`->` What dùng để hỏi về cái gì ( `9 , 11` )

`10`.

`( - )` His brother isn't reading book in the library

`( ? )` Is his brother reading book in the library ?

`-` Yes , he is

`-` No , he isn't

`( Wh )` Where is his brother reading book ?

`->` Where dùng để hỏi về địa điểm

`11`.

`( - )` Mr.Phong doesn't often listen to music in the morning

`( ? )` Does Mr.Phong often listen to music in the morning ?

`-` Yes , he does

`-` No , he doesn't

`( Wh )` What does Mr.Phong often do in the morning ?

`12`.

`( - )` Her birthday isn't on the $12^{th}$ of November

`( ? )` Is her birthday on the $12^{th}$ of November ?

`-` Yes , it is

`-` No , it isn't

`( Wh )` When is her birthday ?

`->` When dùng để hỏi về mốc thời gian

`\text{# TF}`