1until的用法

until用于肯定句中时，句子的谓语动词必须是延续性动词。

eg: My teacher works in the office until 6 o’clock in the afternoon.

我的老师在办公室一直工作到下午6点。

在…not… until…句型中，主句的谓语动词要用终止性动词，如start，leave，arrive, finish, stop等，表示从句的动作完成，主句的动作才刚发生。

eg: The boy didn’t leave his room until he finished his homework.

小男孩做完作业才离开房间。

当主句使用一般将来时态时，until引导的从句用一般现在时。

eg: He won’t give up until you tell him the truth.

在你告诉他真相之前，他是不会放弃的。

2until的用法例句

1、Until 1982 he was senior lecturer in botany at Durham University.

1982年以前他一直是达勒姆大学生物系的高级讲师。

2、The traffic laws don't take effect until the end of the year

交通法要到年底才生效。

3、It was not until 1911 that the first of the vitamins was identified.

直到1911年才发现了第一种维生素。

4、I waited a long time until a script came along that I thought was genuinely funny

我等了很长时间，直到出现了一个我认为真正逗趣的剧本。