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同学你好,以下是until的用法:
其实意思差别不大,就是说法不一样。not until 有点双重否定的意思吧。
比如说,我待到九月才走,这句话用两种结构来表达,分别是:
I stayed until September.
I did not leave until September.
再比如说,我一直跳舞,直到我累了为止,分别可以说:
I kept dancing until I was tired.
I did not stop dancing until I was tired.
以下是until的用法:
1、 until用在肯定句,意思为“直到”,谓语动词通常是延续性动词
例句:
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、用在否定句,谓语动词通常是瞬间性动词。
例句:
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。
3、主句的谓语动词为一般现在时或一般将来时, until从句中的谓语动词为现在完成时,用来强调从句谓语动词表示的动作发生在主句谓语动词表示的动作之前。
例句:
I won’t go to bed until I have finished my homework.
我要完成作业才睡觉。
4、主句中的谓语动词为一般过去时,从句中的谓语动词为过去完成时,用来强调从句谓语动词的动作发生在主句谓语动词表示的动作之前。
例句:
Li Lei didn’t come until the film had begun.
直到电影开演,李雷才来。
希望回答对同学有帮助~