The students are cleaning the classrook(改为一般疑问句并作肯定和否定回答)

问题描述:

The students are cleaning the classrook(改为一般疑问句并作肯定和否定回答)

Are the students cleaning the classrook?
Yes, they are
No ,they aren't

are The students cleaning the classrook
yes,they are.
no,they aren't