帮我看看这两个英语题呗1.we were surprised to see the heavy log ___ by the li_英语解答

帮我看看这两个英语题呗
1.we were surprised to see the heavy log ___ by the little boy.
A.could be lifted B.was able to be lifted
为什么选?这两个词组有什么不同?
2.---- more and more people suffered by the earthquake _____ keep living by themselves.
--- Yes.They ______ get help from the government.
A.isn't able to,can B.can't,be able to C aren't able to,can
为什么选?区别在哪里?

人气：210 ℃　时间：2020-05-24 20:52:35

解答

1B
在针对过去情况时,两者的区别意义明显,不可混用.因为,在过去情况下,主语“潜能”的实施与否,业已成了定局.比较：
1）We could save his life.我们有办法救活他. （但未必实施）
2）We were able to save his life.我们得以救活他.（付诸实施）
句1）只表示主语有救人的能力,但未必实施；句2）则表示主语非但有救人的能力,而且业已成功实施了.
原句子,我们看到小男孩能举起这个重木头,感到很惊讶,已经看到,已经付诸实施了,所以选B
2C
否定句式中,can't be not able to两者可以通用.第一个空用 can't或者aren't able to
第二个空用 can 所以最终只能选C
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