Cấu trúc Thì HTTD : 

`-` CKĐ : `\text{S + be + V-ing}`

`-` CPĐ : `\text{S + be not + V-ing}`

`-` CNV : `\text{Be + S + V-ing ?}`

`2`.isn't stopping / is driving

`3`.is knocking

`4`.aren't reading / are riding

`5`.is running

`6`.is shining

`7`.are playing

`8`.are going

`9`.am doing / is listening

`10`.am listening

`11`.am reading / is watching

`12`.is being / is listening

`\text{@ TheFox}`

Đáp án:

`2.` isn't stopping / is driving

`3.` is knocking

`-` có " listen!" dấu hiệu thì HTTD

`4.` aren't reading/are riding

`5.` is running

`-` có "Look at Marry!" dấu hiệu thì HTTD

`6.` is shining

`7.` are playing

`-` có " now" dấu hiệu thì HTTD

`8.` are going

`-` có " at the moment" dấu hiệu thì HTTD

`9.` am doing/ is listening

`-` có " now" dấu hiệu thì HTTD

`10.` am listening

`-` có " Keep silent!" dấu hiệu thì HTTD

`11.` am reading/ is watching

`-` có " at the moment" dấu hiệu thì HTTD

`12.` is being/ is listening

`-` Cấu trúc:

`+` Thì Hiện tại tiếp diễn:

(+) S + am/is/are + V-ing

(-) S + am/is/are (not) + V-ing

(?) Am/is/ are + S + V-ing