句型转换。
1. There are some boys under the tree. (改为否定句)
    _____ _____ _____ boys under the tree.
2. There is a car in front of the building. (改为一般疑问句并作肯定回答)
    _____ _____ a car in front of the building?
    _____ , _____ _____ .
3. The hospital is next to a factory. (对划线部分提问)
    _____ _____ the hospital?
4. There are ten cups on the desks.  (对划线部分提问)
    _____ _____ _____ _____ _____ on the desks?
5. Tom is behind Lingling. (改为同义句)
    Lingling is _____ _____ _____ Tom.