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。
习惯用语
unless and until=until
第二个句子里的until就是直到的意思,可以和till互换.
不是所有的地方都要用not until啊,不是所有的句子都牵涉到否定啊.
这句话语法错了Mr. Smith married until he was forty-five
应该是Mr. Smith wasn't married until he was forty-five.
not ..........until直到........才
只能说你得去了解每个单词的不同用法。。。
内容全部来源于网络收集，如有侵权，请联系网站删除：QQ：24596024