3、His grandfather goes to see the dentist once a month．(对划线部分提问)

　 　　　　　　　　　　does his grandfather 　　　　　to see the dentist?

2、I spent half an hour watching TV last night．(变同义句)

　 It　　　 me half an hour　　　　 TV last night．

1、Clark has to clean the room．(变否定句)

　 Clark　　　　 　　　　　　　to clean the room．

10、Listen!Someone　　　 (sing)a song in the next room．

9、Lucy didn’t　　　　 (watch)TV last night．

8、They　　　　 (have)lunch just now．

7、Don’t　　　 (play)in the street．It's dangerous．

6、We　　　 (visit)our parents next week．

5、It is time for　　　 (have)classes．

4、After school，Brian always　　　　 (go)for a walk．