able的名词形式怎么写

　　句型

　　1、His ability falls short.

　　他的能力不足。

　　2、The acting abilities of both were well-known.

　　这两个人的`表演才能是众所周知的。

　　3、Almost everyone has some musical ability.

　　几乎人人都有一些音乐才能。

　　4、He had the all-round ability as a director.

　　他有当导演的多方面才能。