We shall be able to deal with all sorts of problem.我们应该能够应付各种困难。
She bet me 20 that I wouldn’t be able to give up smoking.她和我打20英镑的赌，说我戒不了烟。
Free will makes us able to choose our way of life.自由的意志使我们可以选择自己的生活方式。
By no means was he able to handle it.这件事他绝对没办法处理。
He is an able man.他是一个能人。
Difficulties help to forge people into able folk.困难有助于把人们锻炼成能干的人。
She is an able leader.
He’s an able speaker.
He is an able actor.
He is an able engineer.
She is a very able driver.
He was acknowledged as an able statesman.
The able pilot successfully landed the crippled plane on the road.
There are many able students in our institute.
She’s an abler teacher than he is.
Brooks is the most able student in the class.
He is the ablest man I know.
This problem is now being looked at by some of the ablest scientists in the country.
That’s an able portrait.
The audience applauded his able speech.
The lawyer put forward an able defence of his client.
The counterplot was an able achievement.
The man made a very able speech.
Ami is an infant barely able to walk.
She seems very able.
The general impression at the studio was that he was able.
He could almost always get a job, because he was so able.
As long as he was physically able, he went to work in the fields.
As long as they are physically able,they tend to live on their own.
He is the most able.
She’s by far the ablest in the class.
S+be+～+ prep. -phrase
Leave real living to people who are able for it.
Leave the work for those who are able for it.
He felt able for the journey.
Mary is able for four helpings of dessert.
He was not able for much work.
He was not so able in management as expected.
用作形容词(adj.)be able to能够做…事
S+be+～+to do sth
I am able to swim.
She is quite able to teach.
I am able to pay you now.
I don’t think he is able to take any more bad news.
I don’t think he’s able to do this type of work.
He is well able to take care of himself.
He is able to write music.
He is financially able to establish a home.
I was in a small boat during the storm, but it stopped after half an hour and I was able to breathe again.
I was able to run away, but Tony wasn’t.
He was able to jump into the sea before the boat was blown up.
In this way, he was able to solve the mystery.
By the time he graduated from college, he was able to speak three foreign languages.
The night was clear and we were able to see the stars.
It was very difficult to make a heavy machine fly. But they were able to make it fly.
Then they beached the ship on the shore where they were able to repair the damage.
I’m sorry that I wasn’t able to phone you yesterday.
He was not able to see the difference.
They will be able to finish the work tomorrow.
I believe that you will be able to speak English fluently in one month.
After studying differential calculus you will be able to solve these mathematical problems.
I hope you will be able to speak English better soon.
We shall be able to reach our destination tomorrow.
Have the nautical chart at your fingertips, and you’ll be able to steer your ship.
I won’t be able to see him today.
Will you be able to finish the work before Sunday?
Will you be able to come this afternoon?
Will she be able to cope with the work?
He said that he was having financial difficulties and wasn’t able to pay his bills.
I haven’t been able to go.
I haven’t been able to get in touch with her.
He has not been able to submit his report on time.
He’s never been able to admit to his mistake.
They have not been able to take a rest for three days.
Had it not been for his help, they would not have been able to settle their dispute.
I may be able to see you tomorrow.
You may not be able to discriminate between the sundry articles, but you can cross-check them.
You might be able to persuade him.
If you give a blow, you must be able to take one.
I used to be able to swim like a fish.
The other planets may not be able to support life, but it isn’t easy on this one either.
He seemed able to put complicated thoughts in simple words.
I don’t feel able to go on with reading it.
I hope to be able to do the work.
I regret not being able to help her.
I love the house — it’s wonderful being able to see the sea from my window.
Paul isn’t able to come to the party because he is ill.
Mary’s more able to help you than I am.
Granny is still able to read without glasses.
My wife is able to sing and dance.
The young man is able to do great things.
The workers are able to improve the machine.
Most children are able to walk before they are able to talk.
The patient was soon able to sit up.
One day man will be able to control some unknown factors of weather.
Birds are able to fly.
The dog is able to count.
Is the electronic computer able to think?
The satellites are able to observe the changes of climate on earth by means of remote sensors.
The answering machine is able to store messages that are up to two minutes in length.
Heat is able to cure breast tumours in some animals.
The rage of a wild boar is able to spoil more than one wood.
Once you’ve had some sleep you’ll feel better able to cope.
David is more able to deal with this problem than I am.
He was able to be heard.
A good auditorium will assure that the sound is able to be heard from every seat.
The difficulties were able to be overcome by the students of our class.
S+be+～+to be+ n\u002e/adj\u002e
He was able to be cold about her now. It was wartime. They were enemies.
be able to cut能办事，有管理能力
S+be+～+to cut sth
He’s not able to cut his responsibilities like we thought.
Do you think you’re able to cut it?
be able to take经受得住（某事）
S+be+～+to take sth
I don’t think he is able to take any more bad news.
only just able仅能；勉强能；几乎不能
be able to answer有能力回答
be able to come能够来
be able to cure能够治愈
be able to finish有能力完成
be able to go能够去
be able to help能够帮助
be able to inherit有资格继承
be able to move能移动
be able to persuade能说服
be able to read能读书
be able to see能看见
be able to sit up能坐起来
be able to swim会游泳
be able to teach有能力教
be able to vote有资格投票
be able to walk能行走
be able for有能力做…
be able in善于…
除be外, able还可用在其他系动词如seem, feel等之后。
able作“聪明的,能干的”解时可受副词very, quite, more, better, poorly等修饰。
able作“能够…的”解时比较级和最高级可用abler/ablest,也可用more able/most able。作“聪明的,能干的”解时比较级和最高级用abler/ablest。
able常以be able + 不定式的形式出现，与can 同义。有些具体情况下只能用 be able，而不能用 can。
Some people are able to/can walk on their hands.
One day，scientists will be able to find a cure for cancer.
（NOT…will can find…)
The mistake is able to be corrected.
该句应改作The mistake is capable of being corrected.
指能力时，不一定意味着实行，如“经过了两个月的步行，他们到达了目的地”通常不说 After a two-month tramp, they were able to reach their destination.而是用 After a two-month tramp they reached their destination。
He is a capable lawyer.
He is an able lawyer.
He’s an able man who you can fall back on.
The scandal is capable of the basest tricks.
The doctor performs a very able operation.
Glass, which breaks at a blow, is, nevertheless, cap- able of withstanding great pressure.
4.用作表语时, able后接动词不定式; capable后接“of+名词或动名词”。试比较下面两句:
He is able to look after〔capable of looking after〕 him- self now.
He is capable of hard work.
She is not able to dance tonight.她今晚不能跳舞。
The lame girl is not capable of learning to dance.
He is able to overcome all kinds of difficulties.
This car is capable of carrying five persons.
1.able to- v 的意思是“能够”; 而enable to- v 的意思是“使能够”。
be able to, can
Can I come in?我可以进来吗?
That can’t be true.那不可能是真的。
以上两句都不可换用be able to。
2.can只有现在时和过去时两种形式,而be able to则有多种时态形式。试比较下面两句:
Will you be able to come tomorrow?
This factory has been able to produce newly-devised sewing machines.
3.在be able to之前可加用另外一个助动词,且多用于否定或疑问结构,而can则无此用法。
4.用于否定结构, be able to表达一时情况,而can则表达往常情况。试比较下面两句:
He is not able to swim today.
He can’t swim at all.
5.be able to后可接系表结构,表示一种状态或性质;而can没有这种用法。例如:
He was able to be cold about her now.他现在对她可能有些冷淡。
6.be able to有非谓语动词形式,而can则没有。例如:
I hope to be able to do the work.我希望能做这项工作。
was/were able to, could
1.was/were able to只能表示一次性事件,不能表示经常性事件; 而could可以用来表示习惯性动作的完成。例如:
I could run after a bus and catch it twenty years ago, but I can’t do that now.20年前我能追上公共汽车,现在不行了。
2.was/were able to不仅表示过去的能力与可能性,还表示“能够并确实做到”,相当于managed to do,而且重点往往在于“成功地实行”; 而could主要表示“潜在的能力”。例如:
I was able to pass the examination.
I could pass the examination.
I ran after the bus, but couldn’t〔wasn’t able to〕 catch it.我跑着追那辆公共汽车,但没能追上。
误 After a two-month tramp they were able to reach their destination.
正 After a two-month tramp they reached their destination.
正 After a two-month tramp they succeeded in reaching their destination.
正 After a two-month tramp they managed to reach their destination.
误 This work wasn’t able to be finished in a week.
正 This work can’t be finished in a week.
误 It will be able to see you on Sunday.
正 It will be possible to see you on Sunday.
误 I’ll be possible to see you on Sunday.
正 I’ll be able to see you on Sunday.
析 非生物名词作主语时用can或be possible to；“人”作主语时才用be able to。