I haven't been able to get much work done today.
我今天未能幹多少工作。
He's well able to take care of himself.
他完全能夠自理。
I've never been able to work her out.
我從未能摸準她的秉性。
Would you mind leaving us alone for a few minutes?
你不介意讓我們單獨待一會吧？
It was her first experience of living alone.
那是她第一次單獨生活。