括号部分提问 These are (his) books.There are (some trees) in my sc

括号部分提问
These are (his) books.
---Whose books are these?
There are (some trees) in my school. ----What's in your school?There are (many apples) on the tree .----What's on the tree?
I am (a teacher)---What are you ? 对于there be后面的主语提问,即哪里有什么?一般一律用单数,即What's,而不是用复数.

Whose books are these?
What are there in my school?
What are there on the tree?
What are you?
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