11. You are late for school.

12.until：[ən'til]

conj.&prep. (=till) 直到...时,到...为止

1) until

I waited until he came back.我一直等到他回来。

The war lasted until 1945.战争持续到1945年。

2) not … until

I didn't leave the boy until his mother turned up.

直到这孩子的母亲来,我才离开。

The noise of the street didn't stop until it was midnight.

街上的噪音直到半夜才停止。

2)当Not until位于句首时,句子要倒装。

Not until the teacher came in did the students stop talking.

3)not until的强调结构为:It is / was not until+从句/表时间的词+that+...。

It was not until the teacher came in that the students stopped talking.

以上就是威廉希尔app 为大家提供的2015初二上册英语知识点，大家仔细阅读了吗?加油哦!

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