the boy isn't playing,,,
is the boy playing,,,,, yes, he is. No, he isn't
what is the boy doing?
Is the boy playing basketball
Yes, he is
No, he isn'喊姿姿郑绝册凳t
What the boy doing?
The boy is not playing basketball.
Is the boy playing basketball? - Yes, he is. - No, he isn't.
What is the boy doing?
The boy is playing basketball.
改为否差李袭定虚兄句:The boy isn't playing basketball.
改为一般疑问句:Is the boy playing basketball?
肯定回答:Yes, he is.
否定回答扰塌:No, he isn't.
对 playing basketball进行提问:What is the boy doing?