while

They arrived while we were having dinner..他们来时我们正在吃饭。

While she was asleep, thieves broke in and stole her handbag..她睡着的时候，小偷闯进来偷走了她的手提包。

She met Andy while working on a production of Carmen..排练《卡门》时，她认识了安迪。

after a while,过了一会儿

a little while,不久，一会儿

all the while,一直；始终

quite a while,有一阵子，半天；相当长一段时间

a while ago,刚才，方才

at whiles,有时；间或；有时常常

a while back,一段时间之前，不久之前；前阵子

while away,消磨；消磨时间

all this while,这阵子

between whiles,不时的，时常