until都有哪些用法？

until有介词和连词两种词性，在用作介词和连词时可以表示“到…时，直到…为止”的意思。until在用于肯定句时，句子中的谓语动词必须是延续性动词。当句子使用的是一般将来时态时，由until引导从句要用一般现在时。

常见句型

He put off his departure until his sister came.

他推迟行期，直到他妹妹来了之后才走。

I didn't wake up until I heard the alarm clock.

直到听到闹钟的铃声我才醒来。

You can't leave until your work is finished.

在你的工作完成之前，你不能离开。

I was in the dark about it until she told me.

这件事在她告诉我之前，我毫不知情。

She sticks to the work until it is finished.

她坚持工作，直到把工作完成为止。

词汇搭配

until further notice 另行通知 unless and until 直到…才

until now 迄今 until the cows come home 无限期地

right up until 一直到 until then 到那时

until the present 到现在为止 until recently 直到最近