able的名詞形式怎麼寫

句型

1、His ability falls short.

他的能力不足。

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

這兩個人的`表演才能是眾所周知的。

3、Almost everyone has some musical ability.

幾乎人人都有一些音樂才能。

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

他有當導演的多方面才能。