chia verb :

hung (go) to the park but he (not call) his friends tomorrow

a. goes/won't call

b. will go/won't call

c. will go/doesn't call

d. both b & c are correct 

Rút gọn mệnh đề If bằng Ving hoặc Vp2 nhưu thế nào ạ ?

the road in front of my house (widen) at the moment

chia verb

many people prefer (live) in the countryside

chia verb

he used to (play) tennis better than he does now