be able to do的意思是什么？

be able to do sth例句如下：

1、I am able to do the work

翻译：我能做这项工作

2、I was able to do the worlk.

翻译：我过去能做这件事。

3、I will be able to do the work.

翻译：我将来能做这件事。

4、I have been able to do the work.

翻译：我已经能做这件事。

5、We are able to finish this project.

翻译：我们能够完成这个项目。