状语从句种类从属连词例句说明until/till和since
摘要: 状语从句种类从属连词例句说明until/till和sinceuntil/tillWewaitedtill(until)hecameback.我们一直等到他回来。如主句动词是......
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状语从句种类从属连词例句说明until/till和since until/till We waited till (until)he came back .我们一直等到他回来。 如主句动词是持续性动作，常用肯定式，表示“直到…为止” She didn’t stop working until eleven o’clock .她到11点钟才停止工作。 Until he had passed out of sight, she stood there. 她站在那里看着，直到看不见他的身影。 如主句动词是瞬间动词，常用否定式，表示“直…才”“在…以前不”,从句放在句首表示强调，一般用until 新概念英语网课 新概念英语听力 新概念英语音频 since Great changes have taken place in China since 1978. 自从1978年以来中国发生了巨大的变化。 As soon as I arrive in Shanghai, I’ll write to you.我一到上海就给你写信。 状语从句在主句之前时一般用逗号与主句分开，如从句在主句之后则不必用标点符号。 Mr. Li has been here since he came back.自从李先生回来以后，他一直在这儿。 I have written home but once since I came here.自我到这儿以来，只给家里写过一封信。 since后是非延续性动词的过去式，则时间的起点应从该动作发生时算起。 He has written to me frequently since he was ill.自从他病好以来，经常给我来信。 since后是延续性动词的过去式，则时间的起点应从该动作结束时算起。 It is (has been) a long time since I smoked.我戒烟已有两年了。 It has been two years since I began to smoke. 我吸烟已有两年了。 It + be+ some time+since 短语或从句，如果从句中谓语动词是非延续性动词，意为“做某事已有多长时间”；如果是延续性动词，意为“不做某事已有多长时间”。需要注意主句与从句时态的一致性。 11. I forget where I read the article, or I _____ it to you now. A. will show B. would show C. am going to show D. am showing 12. “It looks as if he were drunk.” “So it does. _____.” A. He’d better give up drinking B. He shouldn’t have drunk so much C. Health is more important than drink D. I wonder why he is always doin g so 13. “Mary looks hot and dry” “So _____ you if you had so high a fever.” A. do B. are C. will D. would 14. “He will come tomorrow.” “But I’d rather he _____ the day after tomorrow.” A. will come B. is coming C. came D. had come 15. All the doctors in the hospital insisted that he ____ badly wounded and that he ____ at once. A. should be; be operated on B. were; must be operated on C. was; should be operated D. was; be operated on 16. ______ smoking, he would not have got cancer in the lung. A. Was he given up B. Had he given up C. Did he give D. If he gave up 17. “I still haven’t thanked Aunt Lucy for her present.” “It’s time you _____.” A. do B. did C. had D. would 18. “Do you know his address?” “No, I also wish I _____ where he _____.” A. knew, live B. knew, lives C. know, lives D. know, lived 19. It is hard for me to imagine what I would be doing today if I ____ in love, at the age of seven, with the Melinda Cox Library in my hometown. A. wouldn’t have fallen B. had not fallen C. should fall D. were to fall 20. Without the air to hold some of the sun’s heat, the earth at night ____ for us to live. A. would be freezing cold B. will be freezing coldly C. would be frozen cold D. can freeze coldly 11. 【解析】.根据上文的语境可知句中的 or 隐含有一个虚拟的条件，即 or=if I didn’t forget where I read the article(要是我没忘记我在哪儿读过这篇文章的话——但事实上忘了)。 【答案】B 12. 【解析】关键信息是It looks as if he were drunk 中的虚拟语气，句子既然用了虚拟语气，也就是说，“他喝醉了”不是事实，只是他的言行好像是醉了，所以此题的最佳答案是D. 【答案】 D. 13. 【解析】 由于空格后的 if 条件状语从句的谓语用的是虚拟语气(这是很重要的信息)，所以主句要用 would 而不用 will，即答案应选D. 【答案】D 14. 【解析】按照英语习惯，would rather 后接that 从句时，从句谓语通常要用虚拟语气，即用过去式表示现在或将来， 用过去完成时表示过去。 【答案】C 15. 【解析】insist后的从句谓语有时用“should+动词原形”这样的虚拟语气，有时不用，具体要看该谓语动词所表示的含义。一般说来，若该谓语动词所表示的动作尚未发生，或尚未成为事实，则用虚拟语气;若该谓语动词所表示的动作已经发生，或已经成为事实，则要用陈述语气。分析上题的句意，可知只有选D最合适。 【答案】D 16. 【解析】是因为时态前后有矛盾。由于主句谓语是would not have got，这表明是对过去事实作出的假设，所以从句谓语应该是 had given up，而不是像D项那样用一般过去时。另外，当虚拟条件句中有 had, should, were 等词时，通常可以省略 if，并将 had, should, were 提前置于句首。 【答案】B 17. 【解析】It’s time you did 为 It’s time you thanked Aunt Lucy for her present 之略。按照英语语法，it’s time 后从句通常要用过去式。 【答案】B 18. 【解析】第一空填 knew，因为 I wish 后的宾语从句要用虚拟语气(即用过去式表示现在的想法);第二空要填lives，即用陈述语气，因为 where he lives 是一个客观事实，而不是 I wish 的内容。 【答案】B 19. 【解析】 此题涉及错综时间虚拟条件句，主句与现在事实相反，条件句与过去事实相反。句意为：要不是在七岁时就迷上了 Melinda Cox 图书馆，我真不能想像我如今会在做什么。 【答案】B 20. 【解析】without 引出的介词短语为一个与现在事实相反的含蓄条件句。 【答案】A 
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