【经典必背】
A man can fail many times, but he isn't a failure until he begins to blame somebody else. 一个人可以失败很多次，但是只要他没有开始责怪旁人，他还不是一个失败者。
【课文原句】
I study late every night, sometimes until 2 a.m., but I don't think I'm improving. 我每天晚上都学到很晚，但是我认为自己并没有提高。
Women had no right to take part in the Olympic Games until 1912. 直到1912年妇女们才有权利参加奥林匹克运动会。
You will, not find out the answer until, the end of the film. 直到电影结束你才会找出这个答案。
【基础知识】
till和until既可作介词，后接名词，构成介词短语；也可作从属连词引导时间状语从句。till和until都表示“到……为止、直到……才……”。
1. 用于肯定句中，表示某一动作或状态持续到till或until结构所表示的时间才结束。此时，句子的主要动词必须是持续性动词。
It may last until Friday. 这可能要延续到星期五。
He will be working until 5 o'clock. 他将一直工作到五点钟。
Heat can be conducted from a hot body to a cooler one until both are at the same temperature. 热能可以从一个热的物体传到一个较冷的物体，直到两者温度相同为止。
Continue in this direction until you see a sign. 一直朝着这个方向走，你就会看见指示牌了。
2. 用于否定句，表示某一动作持续到till或until结构所表示的时间才开始。其主要动词可以是持续性动词，也可以是非持续性动词。
The secret was never told until after the old man's death. 这个秘密在老人去世后才被披露。
Don't open it until your birthday. 等到你过生日那天再打开。
I won't stop shouting until you let me go. 你不放我走，我就一直喊叫。
3. not...until...句式的倒装句
Not until we know more will we be able to improve the situation. 直到我们了解得更多，才能改变这种情形。
如果until为从属连词，until引导的从句提供谓语发生的时间，从句的主谓不倒装
4. not...until...句式的强调句，不用倒装语序。
He invented many new ways to treat the wounded, but it was not until after the war that he made his most important discovery. 他发明过许多新方法来医治伤员，但是直到战后才有了最重要的发现。
5. not...until...句式与其他句式的比较
① not...until...句式总有“动作发生较迟”之义。
Among the great mathematicians there are about as many who showed mathematical talents in childhood as there are those who showed none at all until they are older. 在伟大的数学家中，童年就显露数学才华的人和直到相当年龄才显露才华的人差不多一样多。
② not...before...仅用表示动作先后关系，若主句谓语用一般将来时not...until...与not...before...意义相同。
It won't be long before you regret what you have done. 不久后你就会后悔你做的事。
Don't start smoking before a dinner is finished. 饭后才能抽烟。
③ Not...unless...常用来表条件，其主句的谓语常用一般将来时，而且unless只能接从句。
The doctor will not carry on the operation unless it is necessary. 到必要时医生才动手术。