$III.$ 

$1.$ are not helping.

$2.$ is not staying.

$3.$ am not travelling.

$4.$ are not studying.

$5.$ are not playing.

$6.$ is not watching.

$7.$ are not talking.

$8.$ is not shining.

***

$IV.$ 

$1.$ is swimming.

$2.$ am reading.

$3.$ is enjoying.

$4.$ are playing.

$5.$ are doing.

***

$6.$ Look! The girls are skipping in the schoolyard. (skip)

(DHNB: Look!)

$7.$ Ssh! They are studying in the library. (study)

(DHNB: Ssh!)

$8.$ Listen! Someone is knocking at the door. (knock).

(DHNB: Listen!)

$\textit{^ ChieyewCucCuk ^}$

$\textit{III.}$

1. aren't helping

2. isn't staying

3. don't traveling

4. aren't studying

5. aren't playing 

6. isn't watching

7. aren't talking

8. isn't shining

$\textit{IV.}$

1. is swimming

2. am reading

3. is enjoying

4. are playing

5. are doing

6. are skipping

7. are studying

8. is knocking 

$\rightarrow$ HTTD

$\textit{*Cấu trúc*}$

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

(-) S + don't/isn't/aren't + V-ing + (O)

(?) Am/Is/Are + S + V-ing + (O) ?

$\textit{*Cách dùng*}$

+) Đang xảy ra tại 1 thời điểm xác định ở HT

+) Sắp xảy ra có dự định từ trước

+) Không dùng với các động từ chi giác như: see, hear, like, love,...

$\textit{*DHNB*}$

- at the moment, right now, at present, now, look!, be quiet!,...

                   $- #Chúc bsajn hocj tốt! -$