I felt as if I had known her for years.
Mary behaved as though there was nothing wrong.
as long as只要,既然
As long as it doesn't rain, we can have the game,
As long as you don't speak it out, how can we help you with your difficulty?
as regards 关于
As regards that matter, I'm quite of your opinion.
as yet 迄今,到目前为止
They haven't come up with any solution to the problem as yet.
at a loss困惑不解,茫然不知所措
They were at a loss as to which way to follow.
at a time每次,一次
Pass me three bricks at a time.
at all costs不惜任何代价,无论如何
They are determined to do it at all costs.
at all events无论如何,不管怎样
She lost nearly everything but at all events she’s still alive.