` HT TD `

` ( + ) ` : S + be + V-ing 

` ( - ) `  : S + be not + V-ing

` ( ?) `  ; Be + S + V-ing

` DHNB ` 

` + `  : Now

` + `  : at the moment

` + `  : at present

` + `  : look !

` + `  : listen !

` + `  : ...

` 1 ` : are having

` 6 `: are travelling

` 7  : isn't doing - is sleeping

` 8` : aren't working - are doing

`9 ` :isn't doing - is watching

` 10 `Is - reading

` 11 ` : are - playing

` 12 ` : are - washing

` 13 ` : Is - travelling

` 14 ` : is - reading - is listenig

` 15 ` : Is - travelling

`6.` are travelling

`7.` isn't doing ... is sleeping

`8.` aren't working ... are doing

`9.` isn't doing ... is watching

`10.` Is Nga reading

`11.` Are they playing

`12.` Are the children washing

`13.` Is your mother traveling

`14.` is Mr Hung reading

- is listening 

`15.` Is she traveling

`->` Vì đề bài cho chia theo thì Hiện tại tiếp diễn nên tất cả mọi câu trên đều chia theo thì HTTD.

`=>` Cấu trúc thì Hiện tại tiếp diễn

`(+)` S + be + V_ing + O.

`(-)` S + be + not + V_ing + O.

`(?)` Be + S + V_ing + O?

               $\text{#Dii}$