be able to的用法
问题描述：
be able to的用法
答
able [形容词,不是动词!] =能; 能够;有才干
(1) He was able to open the door;
(2) He will come if he is able.能够的
(3) The brakes were able to be fixed.
(4) Maria is a very able nurse.有才干的
(5) They are bright,intelligent,able and confident.有才干
(6) I'd like to be able to study in peace.能够