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2014云南中考英语学习常见错误:can

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2013-12-27

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can ?

[误] A blind man can not judge colours.?

[正] A blind man cannot judge colours.?

[误] I cann't call for you at ten.?

[正] I can't call for you at ten.?

[析] can的否定形式应为cannot或can't.?

[误] It's only six o'clock. That mustn't be the postman.?

[正] It's only six o'clock. That can't be the postman.?

[析] must用来表示一种肯定的推断,如:She must have some problems. She keeps crying. 但在否定句中则要用can't, 要表示对过去的推测则要用"must+have+过去分词"的表达法,如:The lights have gone out.A fuse must have blown.而对过去的否定推测则多用"?can't?+have+过去分词",如:I don't think he can have heard you. Call again.?

[误] We could not help to laugh at once.?

[正] We could not help laughing at once.?

[正] We could not help but laugh at once.?

[析] "couldn't help+动名词"表示禁不住做了某事。但could not help but与could not but后面要加不带to的不定式,意思都是不得不去做某事.如:You could not (help) but respect him.?

can be able to ?

can与be able to都可以用来表示能力,但can只有现在时与过去时,be able to则可用任何时态,如:He will be able to teach the child. 但要表示经过努力而达到的一次性动作则只能用be able to,如:He finally was able to jump over 2?10 meters. 或:The plane was able to fly over the mountain. 但要注意的是这两个词都没有进行时态,而be able to后面不接不定式的被动态。?

can could ?

can与could都可以用在现在时的口语中,只是用could更为礼貌,语气更委婉。如:Could you tell us a story?

2014云南中考英语学习常见错误:can就到这里结束了,大家一定要认真阅读,希望能有所启发,对大家有所帮助。

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