例:1991年6月四级第53题
You ______ all those calculations! We have a computer to do that sort of thing.
A) neednt have done B) shouldnt have done
C) must not have doneD) cannot have done
后面一句是说:这类计算我们由计算机来做。按后面一句的意思来推测,前面是讲:你已经做了全部计算,这是没有必要的。Neednt 后面接动词完成式正是表示这种意思, 所以答案是A。
3. would的用法:
1) 用于提出提议或邀请
例:Would you like to change a seat? Its warmer here.
Would you prefer a hardback edition?
2) 用于提出客气的要求或请求:
例:I would like you to fetch that document for me now.
I would like to know more about your plan.
3) would you mind + doing句型通常用于表示请求对方做一件有一定麻烦的事情,语气一般都非常客气。注意回答时通常是肯定的,以表示愿意做所要求的事情。
例:Would you mind filling in this form?
Would you mind repeating what you just said?
4) 用于委婉地表示自己的意见:
例:I would think the journey will take something like two weeks.
I would look at the problem a little differently.
【英语学习之四级英语中的情态动词】相关文章:
★ 英语学习之虚拟语气---It is (high) time that
★ 英语学习之虚拟语气---比较if only与only if
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