谁知道be able to是什么意思

be able to: [ bi:'eibltə ] 会,能v. 能够例句:

1. Will you be able to glance over my report before I send it to the committee? 在我把这份报告送到委员会之前, 你能粗略地看一下吗?

2. Unless you change your mind (=If you don't change you mind), I won't be able to help you. 除非你改变你的想法，否则我不能帮助你。

3. It took him three months to be able to run a mile. 要能跑一英里需要他三个月。

4.You'll be able to come, won't you? 你能来的，对吗?。