He is visiting his grandparents now 对(visiting his grandparents )提问Betty is playing basketall at school改为一般疑问句Is he watching TV in his room 做肯定和否定回答They are shopping at the supermarket 对（ at the supermarket ）提问
问题描述：
He is visiting his grandparents now 对(visiting his grandparents )提问
Betty is playing basketall at school改为一般疑问句
Is he watching TV in his room 做肯定和否定回答
They are shopping at the supermarket 对（ at the supermarket ）提问
答
What is he doing now?
Is Btty playing basketall at school?
肯定：Yes,he is 否定：No,he isn't
Where are they shopping?
答
what is he doing?
Is Betty playing basketall at school?
yes ,he is . No,he isn't
where are they shopping?
答
1 What is he doing now
2 is Betty playing basketall at school?
3 Yes,he is .
No,he isn't.
4 Where are they shopping