6.    But she is able to do many things. 但是她能做许多事。

is able to能,会

在英语中,can与be able to表示能力是同义的。如:

He can speak two foreign languages. =He is able to speak two foreign languages. 他会说两种语言。

他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/were able to, will/shall be able to等。

I’ll be able to drive the car in a week. 一周后我将会驾车了。

Through his diligent work, he has been able to read the write. 经过他艰苦的工作,他终于能够读书和写了。

表示过去通过努力终于做成了某事要用be able to,而不能用can。如:

I was able to swim to the bank after hard practice. 经过艰苦的练习后,我终于游到河对岸了。

can能表猜测,be able to不能。can的这种用法主要用于疑问句和否定句中。

Somebody is knocking at the door. Who can it be? 有人敲门,会是谁?

It can’t be our teacher who is knocking at the door. 敲门的不可能是我们的老师。

can 表“允许”,与may可以互换,此时不能用be able to代替。如:

--Can /May I sit here? 我能/可以坐在这儿吗?

--Yes, please. 可以。

can事情态动词,只能用作谓语成分,be able to是普通动词短语,既可以作谓语,也可以作非谓语。如:

Being able to speak English fluently, he has no difficulty in communicating with the Americans at the party. 由于它能够流利地说英语,在晚会上他同美国人交流没有困难。

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