not until用法和句子

until 是直到。如:You have to stand on it until you can go against it 。not until 是在。。。之前 如:You can not go against it until you can earn your life 。until一般不放在句首,后面跟时间词连用 如：He came back until midnight。not until:可放句首,但主句要用倒装． Not until midnight did he came back home。还有一种用法与until相似． He did not come back home until midnight。until prep。(=to the time of)直到。。。时,到。。。为止 [常用在否定句中](=before)在。。。以前; 直到。。。才; 不到。。。(不) until his death 直到他死 until four o'clock 直到四点钟 He did not go until night。他直到夜里才走。It was not until yesterday that I noticed it。直到昨天我才注意到这件事。两个不能说区别,因为not until本来就是until的否定,表示直到。才