We are having lunch.
He is reading a book.
The dog is running after a cat.
The boys are swimming across the river.
Are we having lunch?
Is he reading a book?
Is the dog running after a cat?
Are the boys swimming across the river?
We are not having lunch.
He is not reading a book.
The dog is not running after a cat.
The boys are not swimming across the river.
★特殊疑问句：what, which, how, where, who, etc.
What are you doing?
What is she doing?
What is the dog doing?
see, hear, like, love, want
2. have, has当“拥有”讲时没有进行时