can可以替换成be able to (do sth. )，be capable of (doing sth.）。
be able to
能够; （因具有品质或技能）能做到...…的；（因有足够的自由、权力、时间、财力等而）可以...…的
I doubt they'll be able to help but it's worth a try.
我不敢肯定他们能够帮得上忙，但不妨试一试。
be able to的时态
一般现在时：am/is/are able to
一般过去时：was/were able to
一般将来时：will be able to
现在完成时：have/has been able to
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第1个回答 2013-04-20
可替换成: be able to (do sth. ), be capable of (doing sth.)
如: Most children are able to walk before they are able to talk.
= Most children can walk before they can talk.
多数孩子在会说话前就会走路.
He is capable of running a mile in four minutes.
=He can run a mile in four minutes.
他能用四分钟跑一英里.
如: Most children are able to walk before they are able to talk.
= Most children can walk before they can talk.
多数孩子在会说话前就会走路.
He is capable of running a mile in four minutes.
=He can run a mile in four minutes.
他能用四分钟跑一英里.
第2个回答 2013-04-20
be capable to,be able to,have the ability t o do本回答被提问者采纳
第3个回答 2013-04-20
be able to
第4个回答 2013-04-20
be able to