1)

- They aren't skipping rope now.

? Are they skipping rope now?

2)

- The students aren't swimming in swimming pool.

- Are the students swimming in swimming pool?

3)

- I and Thai aren't learning English at present.

? Are you and Thai learning English at present?

4)

- We aren't waiting the bus now.

? Are we waiting the bus now?

5)

- The birds aren't singing in the tree?

? Are the birds singing in the tree?

6)

- The children aren't studying at the moment.

? Are the students studying at the moment?

Cấu trúc:

+ S + be + V-ing ...

- S + am not/isn't/aren't + V-ing...

? Am/Is/Are + S + V-ing...?

Chúc học tốt!!!

`1.` ( - ) They aren't skipping rope now.

( ? ) Do they skipping rope now?

`2.` ( - ) The students aren't swimming in swimming pool.

( ? ) Do the students swimmung in swimming pool.

`3.` ( - ) I and Thai aren't learning English at present.

( ? ) Do Thai and I learning English at present.

`4.` ( - ) We aren't waiting the bus now.

( ? ) Do we waiting the bus now?

`5.` ( - ) The birds aren't singing in the tree.

( ? ) Do the birds singing in the tree?

`6.` ( - ) The children aren't studying at the moment.

( ? ) Do the children studying at the moment?

- Cấu trúc thì HTTD

( + ) S + be + V-ing

( - ) S + am not/isn't/aren't + V-ing

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