`1.` is writing

`2.` aren't speaking

`3.` Are you eating

`4.` is playing

`5.` am not listening

`6.` is building

`7.` are studying

`8.` Are you working

`9.` isn't making

`10.` is watching

`11.` Is Peter walking

`12.` are speaking

`13.` is helping

`14.` isn't playing

`15.` Is James teaching

`16.` are visiting

`17.` are going 

`-` Cấu trúc thì HTTD:

`( + )` S (số ít + He,she,it) + is + V-ing + O

S (I) + am + V-ing + O

S (số nhiều + you, we, they) + are + V-ing + O

`( - )` S (số ít + He,she,it) + isn't + V-ing + O

S (I) + am not + V-ing + O

S (số nhiều + you, we, they) + aren't + V-ing + O

`( ? )` Am + S (I) + V-ing + O?

Is + S (số ít + He, she, it) + V-ing + O?

Are + S (số nhiều + you, we, they) + V-ing + O? 

`-` Dấu hiệu: now, right now, at the moment (in this moment), at present, just now,.... 

`1`. is writing

`2` . aren't speaking

`3` . are you eating

`4` . is playing

`5` . am not listening

`6` . is building

`7` . are studying

`8` . are you working

`9` . isn't making

`10` . is watching

`11` . is Peter walking

`12` . are speaking

`13` . is helping

`14` . isn't playing

`15` . is James teaching

`16` . are visiting

`17` . are going

_________________________

* Cấu trúc thì hiện tại tiếp diễn:

`(+)` `S` + tobe( am/ is/ are) + V_ ing + `O` 

`(-)` `S` + tobe ( am/ is/ are) + not + V_ing + `O` 

`(?)` Tobe( am/ is/ are) + `S` + `V`_ing ?