be able to的用法
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be able to的用法如下:
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:
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、be able to强调一种结果,而can只强调一种可能。如:
Luckily,he was able to escape from the big fire in the end.幸运的是,他终于逃出了大火。
3、be able to可以有各种时态;而can只有一般现在和一般过去两种时态。如:
I could help you last night,but you didn’t come.昨天晚上我能帮你,而你又没来。
Can you see it there?你能看见它在那儿吗?
He is/was/will be able to help you.他能帮你。
4、can可用于表示可能性,推测,允许等情况,而be able to通常不这样用。
You are able to use my pen.误。
You can use my pen.正。
5、can有被动语态,主语为人或物皆可,而be able to只接不定式的主动形式,不接表示被动的不定式,也不可用无生命的名词作主语。例如:
The work is able to be done by him.误。
He is able to do the work.正。
嬴祁苁蓉:[答案] 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.几小时之后,他...
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嬴祁苁蓉:[答案] be able to与can用法区别: (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...
安吉县13632824619: be able to的用法 - ?
嬴祁苁蓉:[答案] 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,able and confident...
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嬴祁苁蓉: 都行 be able to是一个整体 不是情态动词 相当于can 系动词+able to 是词组 就像睡 和 睡觉 一样
安吉县13632824619: be able to的用法 - ?
嬴祁苁蓉: can 和be able to 都可以表示能力.can泛指一般的能力,而且只有两种形式,即:can, could.be able to 则主要指具体做到了某件事的能力,其形式主要是靠be 发生变化,所以形式比can 多.可以说:I can swim. I am able to swim. 但是不能说:All the people could escape from the big fire in time. 只能说:All the people were able to escape from the fire in time.
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