问题描述:
我不是要be able to和can的区别和用法,我是要be able to和are/is able to的区别和用法.
是有一道题:Nowdays people can travel to many places by air.保持句意不变.我把can改成了be able to,但是答案是are able to.所以我想问问有何区别.
是有一道题:Nowdays people can travel to many places by air.保持句意不变.我把can改成了be able to,但是答案是are able to.所以我想问问有何区别.
问题解答:
我来补答展开全文阅读