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can,could和be able to的区别 can 与be able to在用法上既有相同的一方面, 又有不同的地方,这是应该引起注意的。当它们表示能力的时候,是同义的。如: He can speak two foreign languages. He is able to speak two foreign languages. 它们...

(1) be able to 强调通过努力而获得的能力,而can则强调自身已具有的能力.如: She can sing the song in English.她能用英语唱这首歌. He will be able to sing this song in English in a few minutes,too.几小时之后,他也能用英语唱这首歌. (2...

can 与be able to表示能力的时候,是同义的。如: He can speak two foreign languages. He is able to speak two foreign languages. 它们用法上的不同主要体现在以下几方面: can只有两种时态,即can 和could。而be able to有多种时态,如was/...

be able to 的用法有以下5种: (1) be able to 强调通过努力而获得的能力,而can则强调自身已具有的能力。如: She can sing the song in English. 她能用英语唱这首歌。 He will be able to sing this song in English in a few minutes, too. ...

able [形容词,不是动词!] =能; 能够;有才干 (1) He was able to open the door; (2) He will come if he is able. 能够的 (3) The brakes were able to be fixed. (4) Maria is a very able nurse. 有才干的 (5) They are bright, intelligent,...

be able to 与can用法区别 1.can表示“能力”时,和be able to相当,许多场合都可以互相替换。但当叙述过去经过一番努力才能完成的事情或前面有特殊说明,表示你有能力时,只能用be able to。 【正】Can you speak any foreign languages? 你会说...

句子中be able to do 是谓语 be able to 是情态动词,与后面的动词一起构成谓语。 如: 1.He is able to swim . (主谓结构) ( 谓语:is able to swim) 他会游泳。 2. He is able to speak English . (主谓宾结构) ( 谓语:is able to speak...

都表示能。 can和could可以做情态动词,而be able to不可以。 can表示能够,或者在情态动词里表示可能:he can be in the shop.他可能在商店里。Anna can't be chosen.安娜不可能被选上。并且can表示的是能够,比如 I can hear you.我能听见你(...

can 与 be able to 均可表示某人做某事的能力,常可互换。 例如: I'm not able to [can't] explain this. 我不能解释这个问题。 He was able to [could] speak French very well. 他的法语讲得很不错。 但是两者还是有区别的: (1) 从时态形式...

前者是有能力做某事,主语为人 后者是有可能做某事,主语为it is,如果要加上人,就该是it is possible for sb to do 例: He is able to speak English well. It is possible for him to speak English well.

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