until与not...until...及It-is-not-until...that...的用法详解

1．until （即是介词又是连词）要区分开哪种情况是介词及连词

介词prep.

1.直到...时,到...为止

Will this fish keep until tomorrow? 这鱼能搁到明天吗?

2.(用于否定句)在...之前,直到...才

She didn't go to bed until eleven o'clock. 她直到十一点才上床睡觉。

连接词conj.

1.直到...时,到...为止

You can wait here until help comes.你可以在这里等，直到有人来帮你。

2.(用于否定句)在...以前,直到...才

She didn't go to bed until her daughter came back. 她一直等到女儿回来才去睡觉。

You can't leave until I come back.。直到我回来你才可以离开

■“not…until””意思是：“直到……才……”表示在这个界限之前一直没有发生这个动作

■“直到……”表示这个动作一直延续到这个界限出现时。

■not…until””句型翻译成了否定句，如上句：直到我回来你不可以离开×）

■wait、keep是延续性动词，所以用肯定形式；而go to bed、leave是非延续性动词，所以用否定形式。

■用“until”还是“not…until”要看谓语动词是延续性还是非延续性动词

■until用做连词时，要注意以下几点

not…until

到…才…”

从句主句

■对not…until的强调结构为“It is / was not until…that…”虽然两者都有not进行了否定，但中文要译成肯定“直到……才……”

■It was not until yesterday that I noticed it. =I didn’t notice it until yesterday.

直到昨天我才注意到此事。

It was not until I saw Mary that I felt happy. =I didn’t feel happy until I saw Mary

直到见到玛丽我才高兴起来。

■It is / was not until +从句+ that +主句

■not…until句型和It is / was not until…that…强调句型可以互相转换

■Not until…放在句首，该句型中的主句用倒装结构，until引导的从句不要倒装。

Not until+从句+倒装的主句

It was _____ I went there _____ I began to know something about the matter.

直到我到那里我才了解那件事。

A. until; when

B.until; that

C.not until; that

D.not when;that （正确为C）

①Not until the teacher came in did the students stop talking.

直到老师进来学生们才停止讲话。

②Not until next week will the sports meet be held.直到下周才开运动会。

主句倒装时要注意以下几点：

1.主句倒装时注意主句中的谓语动词是is/are/am/was/were时，将此be动词提到主

2.句的主语前面；

3.主句中的谓语动词是实意动词，时态为现在/过去时，将do/does/did提前到主语前，完成时将have/has/had提到主语前；

4.主句中的谓语由情态动词构成时，将情态动词如can/may/must/could等提到主句的主语前。

5.主句中时态为将来时，将will等提到主句中的主语前面。