1、能够
... be able to do能够，会 be about to do刚要，即将 above all首先，首要，尤其是 ...
2、有能力做
... be able to do 有能力做 be about to do 正要，将要做 be absent from 缺席 ...
3、能
... take over 取代，占据 be able to do 能（通过努力而获得的能力） spend in 花费(时间、金钱等)做某事 ...
be only able to do只能够做
be able to do sth能够做某事;有能力做某事;能做某事;有能力干某事
be able to do anything用途多样的
will be able to do能够做到;将能够做
be able to do the会做到的
be able to do something能做某事