the students are cleaning the classroom.(改一般疑问句并否定回答）要写出原因!

the students are cleaning the classroom.(改一般疑问句并否定回答）要写出原因!
the students are cleaning the classroom.(改一般疑问句并否定回答）要写出原因!

the students are cleaning the classroom.(改一般疑问句并否定回答）要写出原因!
Are the students cleaning the classroom
NO,they aren't
一般疑问句有be动词则提到句首 无则用助动词

Are the studients cleaning the classroom? No,they are not.

Are the students cleaning the classroom?
no

Are the students cleaning the classroom?
No ,they aren't.