1.His mother is in Shanghai now.(改为一般疑问句,并作肯定回答）
_ Is__his mother in Shanghai now?Yes,_she__,_is__.
2.The twins are in Class 1,Grade 1.(改为否定句）
The twins__aren't_in Class 1,Grade 1.
3.His brother is polite and helpful.(改为一般疑问句,并作肯定回答）
__Is_his brother polite and helpful?No,_he__ __isn't_.
4.The book is on the desk.(改为复数形式）
The_books__ __are_on the desk.
5.The baby is (three months old）.（对括号部分提问）
_How__ _old__ __is_the baby?
6.My name is (Susan).(对括号部分进行提问）
__What_ _is__your name?
7.The taxis are (green) in Nanjing.(对括号部分进行提问）
__What_ __colour_ _are__the taxis in Nanjing?
8.My uncle is （a teacher).(对括号部分进行提问）
__What_ _is__your uncle?