Question

一个英语句子不明白，请教大师

He wants to read some books to amuse himself with.请问为什么要加一个with

Answer 1

我来告诉你正确答案：
to amuse himself with在此句中做宾语补足语。因为是amuse himself with some books这个用法所以一定要有with，否则就是错的。
比如：
I need some papers to write.这句话就是错的，正确的应该是
I need some papers to write on.因为是write on some papers。

同理：下面这句就是对的
I have a letter to write.因为是write a letter

Answer 2

正确的句式是He wants to amuse himself with some books。

with后面的宾语是some books。翻译为：他想读一些书来使自己愉快。

Answer 3

据我所知，这里应该是不需要加with的。
加with的一般用法为be（keep）amused with。。。用在被动语态里面，表示给人娱乐，欣赏。。。

Answer 4

to amuse himself with是books的定语从句。原句相当于He wants to read some books with which to amuse himself