1. 表示“有能力的”、“能*”,可用作表语或定语。
如:He is an able manager.
他是位有能力的经理。
He is old but still able.
他虽年老,但仍很能干。
2. 用于 be able to do sth(能或会做某事)。
如:He is able to speak English.
他会说英语。
Everyone here is able to type.
这儿的每一个人都会打字。
He will be able to get about in a week or two.
再过一两个星期左右他就能走动了。
He studied hard and was able to pass his examinations.
他学习很努力,所以考试及了格。
注:be able to 不仅有多种时态形式(通常不用于进行时或与 be going to 连用),而且还可以与某些情态动词连用(通常不与 can 连用),甚至还可以有非谓语形式。
如:Since his accident he hasn’t been able to leave the house.
自出事之后,他一直未能离开家。
You might be able to persuade him.
你也许能够说服他。
I hope to be able to do the work.
我希望能干得了这项工作。
I regret not being able to help her.
我很遗憾未能帮助她。
3. able 的比较级和最高级通常是 abler 和 ablest,也可以是 more able 和 most able,有时还可用 better able和best able。
如:You are better able to do it than I (am).
你比我更有能力做这件事。
She’s the person best able to cope.
她是个最能妥善处理问题的人。
4. 若要加强语气,其前除可very, quite, perfectly等修饰外,有时还可用well修饰。
如:He is quite [well] able to take care of himself.
他完全有能力照顾自己。
He’s a very able student, he’s just too lazy.
他是个很有能力的学生,只是太懒了。
若受just, only just修饰,则表示“只能”“仅能”。
如:I was just able to make out a dark figure in the distance.
我只能看见远处有个黑影。
5. able的反义词是unable(不能的,不会的),不是disable,后者是动词,其意为“使残废”“使无能力”。
比较:They were unable to reach a decision.
他们没法做出决定。
Now that he was disabled, his house had become a prison to him.
因为他残废了,他的房子就成了他的牢笼。
来源:可可英语
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