was able to与could之间的区别

所属专题:2015年中考英语  来源:互联网    要点:中考  
编辑点评: 英语在中考中所占的比重不小。想要取得高分,英语语法基础得打好。小编特意为大家整理了中考常考的英语语法点,希望能够帮到大家。

The fire spread through the hotel quickly but everyone __________ get out.

A. had to B. would C. could D. was able to

此题应选D。容易误选C(could)。这里主要涉及could与was able to的用法和区别:

1. 表示过去一般性能力时 (即某人想干什么就能干什么能力),两者都可用:

He could [was able to] run very fast when he was a boy. 他小时候跑得很快。

2. 表示过去特定的能力 (即某人在某一具体场合做某事的能力,往往暗示经过努力才具备的能力),通常用was(were)able to,也可用managed to do sth或succeeded in doing sth,但是不能用 could:

他学习很努力,所以考试及了格。

正:He worked very hard and was able to [managed to] pass his examination.

误:He worked very hard and could pass his examination.

正因为此原因,所以上面一题的答案用 ...was able to get out,而不用...could get out,因为此题谈及的是一种特定场合的具体能力。

但值得注意的是,以上用法只适合于肯定句,若在否定句中,则可用couldn’t代替 wasn’t [weren’t] able to:

He worked hard but wasn’t able to[couldn’t] pass the exam. 他学习很努力,但考试却未能及格。

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