be able to 和can 有什么区别,有例题讲解He was so good a swimmer that he___ swim to the river bank when the boat sank.用哪个,为什么

be able to 和could/can 有什么分别 英语中,can和be able to有和区别? can be able to可不可以用（或者说有没有这个词组）我的意思是can be able to有没有这个词组..如果有.和be able to 有什么区别? be able to 和 be likely to 有什么不同? can和 be able to有什么区别,不要抄袭的,要好理解的谢谢了, can和be able to的区别 can和be able to 的区别 用can和be.able to填空 be able to和can的区别 比较can 和be able to return to 等于什么是等于go back么顺便问一下can和be able to 有什么区别 问下be not able to/be unable to/can't 有什么区别 be able to do和do有什么区别. can 和be able to 能连用么就是说 can be able to ... Only in this way can we be able to...这里 can 和 be able to if he study hard,he will ( ）learn English well.里面应该填什么?选项有：be able to,is able to,can,able to,为什么? be able to的用法be able to和can的区别和用法 can could be able to