6. borrow-----

5. buy-----

4. begin-----

3. leave-----

2. go out -----

1. come-----

6. Have you been to Beijing? (否定回答)

　 _________，_________ _________.

5. He has studied in this school since 2002. (划线提问)

　 _________ _________ _________ he studied in this school?

4. They have swept the floor and cleaned the window. (改为否定句)

　 They_________ swept the floor _________ cleaned the window.

3. With our English teacher’s help, I have improved my English.(改为同义句)

　 _________ _________ _________ _________ our teacher, I have improved my English.