My father isn't a good teacher
Is your father a good teacher?
yes ,he is .
no,he isn't
they aren't Chinese .
Are they Chinese
Yes,they are
No ,they
there are any apples on the plate
There aren't many apples on the plate .
Yes ,there are
No ,there aren't
He wasn't very busy yesterday
Was he very busy yesterday?
Yes,he was .
No,he wasn't
The cat isn't running after the dog .
Is the cat running after the dog?
Yes ,it is .
No,it isn't .