I'll write down his telephone number so as not to forget it .

问题描述:

I'll write down his telephone number so as not to forget it .
这句话中it 是否该去掉呀?不然是不是语义重复呀?

不应该,首先forget是及物动词,后跟it没错,其次去掉it,后面翻译出来是”为了不要忘记“,那么不要忘记什么不知道.