请教下面与Unless有关的句子.

题目

请教下面与Unless有关的句子.
我对Unless的用法比较困惑,想请教下面的句子,然后请帮我回答以及分析一下为什么,
Which of these sentences can be rewritten with unless?
1.I will be surprised if he doesn't have an accident soon.
2.It will be better if we don't tell her anything.
3 You can have the car tonight if Harriet doesn't need it.
4 I will tell you if I can't come.
5 I am going to dig the garden this afternoon if it doesn't rain.
6 She'd look nicer if she didn't wear so much make-up.

答案

其实很简单的,unless 和if not有时候可以互换,你这里基本上都是if的从句,所以说你自己也感觉到if和unless 又是什么关系似的.其实unless 和if not有时候可以互换,但在有些情况下不能互换. 1. 当所述条件要引出一种...