1Have you read twenty-two pages yet?
I haven't read twenty-two pages yet.
2have you done two exercises?
we haven't done two exercises
3has the teacher gone over the students" copy-books?
the teacher hasn't gone over the students" copy-books
4have you made a lot of friends here?
l haven't made a lot of friends here.
5has pan left shanghai for dailan?
pan hasn't left shanghai for dailan.
6 has he taught in this school for three years?
he hasn't taught in this school for three years
interrogatives疑问句
negatives 否定句