1.

A: What are you (do) doing?

B: I (write) 'm writing an email to my friend.

2.

A: Mai usually (cycle) cycles to school.

B: Really? I (not cycle) don't cycle. I (walk) walk every day.

3.

A: Where is Phong? Is he (do) doing his homework?

B: No, he (read) 's reading a book in the living room.

`1` . A: are .... doing

       B: am writing

Cấu trúc câu: What + tobe + S + V/ing ?

                      S + tobe + V/ing + ......

`2`. A: cycles

     B: don't cycle/walk

Cấu trúc câu: S + Adv  + Vs/es + .......

                      S + don't + V

`3`. A: Is......doing

     B: is reading

Cấu trúc câu: Tobe + S + V/ing +... ?

                      S + tobe + V/ing +......

`#Black`