重点词汇until用法总结

until 用法 until(或 till)在句子中用作介词或连词，其含义和 since 有类似之处，只 是 since 强调的是某一段的时间的起点(“从……”)，而 until 表示的是一段时 间的终点(“到……”)。 一.由 until (或 till)构成的介词短语或引起的从句在句中作状语时，如果 是肯定句，句子的谓语动词或主句中的谓语动词一般是延续性的;在否定句或 含有否定意义的句子中，句子的谓语动词或主句中的谓语动词，既可是非延 续性的，也可以是延续性的。肯定句侧重动作延续的时间，否定句说明动作 开始的时间。 例如： They thought their bodies would be well kept in these until they would come back to life. He and the other doctors did not leave until the operation was over. They are not going back to work until they get it. He doesn’t sit down until the other person takes his seat. And then they went on with their work at the empty loons until late into the night. No more work was done on it until the People’s Republic of China was founded. 二.对含有“not … until …”结构的句子进行强调时，须用 it is (was )not until…that…。 例如： It was not until she took off her dark glasses that I realized she was a famous film star. It was not until I saw Margaret the next morning, however, that I felt happy. 三.如果把“it is (was )… that ….”这个强调结构的框架去掉，句子就须 用倒装语序。若是一个复合句时，要倒装主句中的主谓部分。 例如： Not until the early years of the 19 th century ____ what heat is. A. man did know B. man knew C. didn’t man know D. did man know 答案是 D Not until I began to work _____ how much time I had wasted. A. didn’t I realize B. did I realize C. I didn’t realize D. I realized 答案是 B until 与 till 的区别 (1)在句首时多用 until 。例如： Until then I had known nothing about it. (2) 在 from … till … 这一词组里，用 till 比用 until 普通，但也可用 until。例如： I worked from morning till late at night. There was a beautiful Mozart concert on the radio from six o′clock until a quarter past seven. (3)在“good—bye till …”及“up till…”中，till 不能用 until 替代。例如： Yes, we can help one another. Good–bye till then. I’ve lived in the country all my life up till now. until 相关解释 prep. 到…为止;在…以前; conj. 到…为止，在…以前;直到…才; until 例句 1、Until 1982 he was senior lecturer in botany at Durham University. 1982 年以前他一直是达勒姆大学生物系的高级讲师。 2、The traffic laws don't take effect until the end of the year 交通法要到年底才生效。 3、It was not until 1911 that the first of the vitamins was identified. 直到 1911 年才发现了第一种维生素。 4、I waited a long time until a script came along that I thought was genuinely funny 我等了很长时间，直到出现了一个我认为真正逗趣的剧本。 5、I tell you this, I will not rest until that day has come 我可以肯定地说，不到那天我不会休息。 6、I have left my best wine until last 我把最好的酒留到了最后。