现在进行时变一般疑问句及答语解析：
1）变疑问句时，be动词放句首
She  is  →  Is  she
They are  →  Are they
The man is  →  Is  the man

She is doing homework.→ 
Is she doing homework?
她正在做作业吗？
They are doing homework. →
Are they doing homework?
他们正在做作业吗？
The man is doing homework. → 
Is the man doing homework?
那个男人正在做作业吗？

The teachers are talking with them. →
Are the teachers talking with them?
这些老师正在和他们谈话吗？

注意：I /we 要变成 you
I am doing homework. → 
Are you doing homework?
你正在做作业吗？

2）答语
肯定回答：
Yes, I am.
Yes, he is/ she is/ it is.
Yes, we are/you are/they are.

否定回答：
No, I am not.
No, he isn't/she isn't/it isn't.
No, we aren't/you aren't/they aren't.

注意回答时要用代词，比如I。
-Are they playing games?
- Yes, they are. / No, they aren't.
-他们正在玩游戏吗？
-是的，他们在玩。/不，他们没有在玩。

-Is the little girl crying?
-Yes, she is. / No, she isn't.
-小女孩正在哭吗？
-是的，她在哭。/不，她没在哭。

现在进行时变一般疑问句的讲解到此结束，相关知识：
现在进行时变否定句