1. Let's [go ]( go ) to the cinema this afternoon .
翻译: 今天下午让我们去电影院吧.
解释: let在这里是情态动词,后接动词原型.
2. What about [coming] ( come ) to help me ?
翻译: 过来帮帮我怎么样?
解释: what about 后接名词或者动名词.
与how about相同.
3. I don't know how [to use] ( use ) a washing machine .
翻译: 我不知道怎么用洗衣机.
解释: how to do固定用法
4. If you [don't help] ( not help ) me , I'll never go ( go ) to the cinema with you .
翻译: 如果你不帮我,我以后再也不陪你去电影院了.
解释: if后接条件状语从句,接动词原形.help的否定形式为don't help
will在这里作情态动词,后接动词原型.
5. They aren't rich , and so they can't[ afford] ( afford ) the new house .
翻译: 他们不富裕,所以他们付担不起这个新房子.
解释:情态动词后接动词原型