Change the forms of the following sentenses. 句型转换。

1. I think I can swim.（变为否定句）                                                                

2. I have some books to read.（变为否定句）                                                             

3. Li Lei will drive his car to school.（对划线部分进行提问）                                                                  

4. I hurt my arm.（对划线部分进行提问）                                                                

5. will, do, for, you, what, the summer holiday.（连词成句）                                                                

从车站开出的火车，做匀加速运动，最初一分钟行540m，那么它在最初10s行驶______m．