英语翻译

题目

英语翻译
之所以我想参加是因为这不仅可以证明我自己,而且如果我赢得了第一名,我将会有奖学金去买我喜欢的书.
我是这样翻译的,The reason why I wanted to join it because it could not only prove myself ,but if I won the first prize,I would get a lot of money to buy my favorite book.

答案

The reason why I want to take part in it is that it could not only prove myself ,but if I won the first prize,I would get a lot of money to buy my favorite book.解释一下就是that 引导表语从句 原句大意是对,但结构有点紊乱
不能用because 的
why I want to take part in it 作reason的定语从句