I haven't been able to get much work done today.
我今天未能干多少工作。
He's well able to take care of himself.
他完全能够自理。
I've never been able to work her out.
我从未能摸准她的秉性。
Would you mind leaving us alone for a few minutes?
你不介意让我们单独待一会吧？
It was her first experience of living alone.
那是她第一次单独生活。