Can you lift this box on your own?Are you able to lift this box alone?的区别

can 与 be able to do 的区别：be able to与can 都可以表示能力.can泛指一般能力,be able to 则主要指具体做某件事（比较特殊的事情）的能力.如我们可以说：I can swim 和 I am able to swim 这两个句子意思是一样的,简单来说 can 与 be able to 都是用于现在时的话,基本上没有区别.
而alone 与 on one's own 的意思在此处无异,因此Can you lift this box on your own?Are you able to lift this box alone?这两个句子意思上没有区别.
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