1、Is it his computer?Yes,it is.No,it isn't.
2、Is he your brother Tom?Yes,he is.No,he isn't.
3、Are you an English teacher?Yes,I am.No,I'm not.
4、Are they your sisters?Yes,they are.No,they aren't.
5、Are these your books?Yes,they are.No,they aren't.
6、Is that a bird on the tree?Yes,it is.No,it isn't.
7、Is she clever?Yes,she is.No,she isn't.
8、Are you good friends?Yes,we are.No,we aren't.
9、Is this your new bike?Yes,it is.No,it isn't.
10、Are Tom and Lily from England?Yes,they are.No,they aren't.