The watch is on the sofa对划线部分提问（on the sofa)The keys are under the chair.该一般疑问句Are the keys in your schoolbag做否定回答
问题描述：
The watch is on the sofa对划线部分提问（on the sofa)
The keys are under the chair.该一般疑问句
Are the keys in your schoolbag做否定回答
答
-
on the sofa体现地点，所以借助疑问词where
Where is the watch?
Are the keys under the chair?
No, they aren't.
答
Are the keys under the chair?
---No, they aren't.
答
1 Where is the watch?
2 Are the keys under the chair?
3 No ,they aren't