can和be able to 的区别
热心网友
can 和 be able to的区别：（1）形式上的区别：can 只有现在式和过去式 could; 而be able to则可用于多种时态。如：is able to, were able to, will be able to等。（2）语义上的区别：can 通常用来指一种固有的能力，如Ducks canm.鸭子会游水。而be able to则常用来指某一次具体的行为，且是通过了努力后才能够做成某事。如：Though completely drunk last night, he was able to find his home. 虽然昨晚他完全喝醉了，但他还是可以找到家。