关于until的用法及解释.docx

关于until的用法及解释 until是“特性”比较强的词。对于同学们来说只要把它的用法搞清晰驾驭了它的用法运用起来就明确了，但是同学们知道它的用法和词性吗，假如不知道就快来看看吧。接下来我在这里给大家带来until的用法，我们一起来看看吧! until的用法 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，假如是确定句，句子的谓语动词或主句中的谓语动词一般是持续性的;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，既可是非持续性的，也可以是持续性的。确定句侧重动作持续的时间，否定句说明动作起先的时间。 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.假如把“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 的区分 (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一般，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的相关说明 prep. 到…为止;在…以前; conj. 到…为止，在…以前;直到…才; until的例句 1、Until 1982 he was senior lecturer in botany at Durham University. 1982年以前他始终是达勒姆高校生物系的高级讲师。 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年才发觉了第一种维生素。 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 我可以确定地说，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终。 本文来源：网络收集与整理，如有侵权，请联系作者删除，谢谢！第5页 共5页第 5 页 共 5 页第 5 页 共 5 页第 5 页 共 5 页第 5 页 共 5 页第 5 页 共 5 页第 5 页 共 5 页第 5 页 共 5 页第 5 页 共 5 页第 5 页 共 5 页第 5 页 共 5 页