1704926760
1704926761
be able to还可和may, might, should等情态动词一起用:
1704926762
1704926763
I may be able to get a ticket for you.我可能能给你弄到一张票。
1704926764
1704926765
She might be able to help us.她有可能帮我们的忙。
1704926766
1704926767
You should be able to understand this.你应当能理解这一点。
1704926768
1704926769
She wouldn’t be able to accomplish all this alone.她独自一人是不可能完成这一切的。
1704926770
1704926771
be able to还可用在非谓语形式中:
1704926772
1704926773
She hoped to be able to do something for you.她希望能为你做点儿什么。
1704926774
1704926775
He felt bad for not being able to lend a hand.他因不能帮忙感到遗憾。
1704926776
1704926777
She watched all this happen, not being able to do anything.她眼看着这一切发生却毫无办法。
1704926778
1704926779
在上面这些情况下,can和could都是没法用的。
1704926780
1704926781
除了表示“能够”,can, could还有一些其他用法,是不能用be able to代替的。这些用法主要是表示:
1704926782
1704926783
可能性(可译为“可以”、“可能”):
1704926784
1704926785
We can call for you at nine.我们可以9点钟来叫你。
1704926786
1704926787
I’m like that—you can’t alter me.我就是这样,你不可能改变我。
1704926788
1704926789
He said he couldn’t come.他说他不可能来。
1704926790
1704926791
It was so dark that we could see nothing.天是那样黑,我们什么也看不见。
1704926792
1704926793
允许(可译为“可以”、“能”):
1704926794
1704926795
Can I come in?我可以进来吗?
1704926796
1704926797
You can’t smoke here.这里你不能抽烟。
1704926798
1704926799
I asked if I could use her phone.我问可否用她的电话。
1704926800
1704926801
I knew I couldn’t stay here.我知道我不能待在那儿。
1704926802
1704926803
请求(可译为“可否”,用could显得更委婉):
1704926804
1704926805
Could you lend me some money?你可否借我点儿钱?(比Can you…更客气点儿)
1704926806
1704926807
Could I borrow your thermos?我可否借用一下你的暖瓶?(比Can I…稍客气点儿)
1704926808
1704926809
Could I have some more tea?我能再要一点儿茶吗?(也可用Can I…)
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