北师大版高中英语必修2学案Unit5 GRAMMAR.doc

时间状语从句和让步状语从句unit 5 warm-up & lesson 1，unit 5 lesson 2【归纳】时间状语从句1. 由when, while, as引导的时间状语从句(1) when引导时间状语从句表示“当的时候”，从句谓语动词可以是延续性动词也可以是短暂性动词。如： i went there when i was a child.he was quite shocked when i told him the news.when还可以表示突然发生某事，常译为“正在忽然”。如：i was doing my homework when there was a big noise outside.(2) while引导时间状语从句表示“当的时候”，从句中的谓语动词一般是延续性动词。如： while mary was writing a letter, the children were playing outside.i can learn while i work.(3) as引导时间状语从句表示“当的时候”，强调主、从句的两个动作几乎同时发生，或者一个动作随着另一个动作的变化而变化。如：as i was going out, it began to rain.“ill call you at nine,” he said as he left her.he gets more attractive as he gets older.2. until, till引导时间状语从句时，在肯定句中表示“做某事直到某时”，在否定句中表示“直到某时才做某事”。如：we waited until it got dark.i didnt have a personal computer till i was 18.3. as soon as, directly, immediately, the moment / instant, hardly . when, no sooner . than等引导时间状语从句时，表示“一就”。如：as soon as / directly / immediately / the moment / the instant i hear the news, i will let you know.we had hardly sat down at the table, when the phone rang.he had no sooner got home than he began to cook.注：当hardly或no sooner位于句首时，主、谓语要进行部分倒装。如：hardly had we got into the country when it began to snow.no sooner had i started playing tennis outside than it started raining.4. since, ever since引导时间状语从句时，表示“自从以来”，其主句多用完成时。如：ive been very busy since i came back from holiday.he has been living in leeds ever since he moved there 3 years ago.5. 引导时间状语从句的词或短语还有：after, before, every time, the first / second . / last time, by the time等。如：every time i come, he is reading.by the time he was taken to the hospital he was nearly dead.让步状语从句 1. though, although, even if, even though引导让步状语从句，表示“即使，虽然，尽管”。注：though和although引导让步状语从句时，不与but连用，但可与yet, still等连用。如：though / although he s got a good job now, he still complains.even if / even though it is difficult, we shall still do it.2. as引导让步状语从句时，常将形容词、副词、名词或实义动词提到句首，构成倒装。though也可用于此结构。如：old as / though i am, i can still fight. child as / though he is, he knows a lot.try as / though you may, you will never succeed.3. while引导让步状语从句时，一般位于句首。如：while i understand your point of view, i do not share it.4. “no matter +疑问词”或“疑问词+ ever”也可引导让步状语从句。如：no matter when (= whenever) im unhappy, he cheers me up.【即学即练】根据括号内的汉语提示补全下面句子（每空一词）。1. no sooner had i gone outside _ _ _ _ (电话铃就响了).2. ive been here _ _ _ _ _ _ (自从我上次见到你).3. jim will start working in his fathers company _ _ _ _ _ _ _ (他大学一毕业).4. he was sleeping _ _ _ (我们到的时候).5. _ _ _ (不管他说什么), dont go.6. _ _ _ _ (即使你这样说), i do not believe it.答案【即学即练】1. than the phone rang2. since i met you last time3. as soon as he graduates from college4. when we arrived5. whatever he says6. though / although you say sounit 5 lessons 3-4 & communication workshopi. 选用括号内合适的内容填空。1. dr chan adjusted the overhead video _ (so that, since) the students would be able to see the chart more clearly. 2. there were _ (so, such) many books on the subject that cindy didnt know where to begin.3. we listened to the news on the radio _ (so that, because) our tv set was broken. 4. _ (since, though) its too expensive to fly across the country, we are going by bus. 5. why dont you start out early _ (because, so that) you dont have to hurry? 6. the window was covered _ (for, so that) it was not possible to see inside. 7. we started early _ (as, in order that) we might arrive before dark. 8. he was so ill _ (because, that) we had to send for a doctor. ii. 用括号内所给连词将每组句子合并成一个复合句。1. he was sleepy. he went to bed. (because)_2. it was getting late. i turned around to start for home. (as)_3. you cant answer. perhaps we should ask someone else. (since)_4. it was an interesting book. he couldnt put it down. (so . that)_5. id put on a lot of weight. i couldnt get into my trousers. (such . that)_6. he saved up his money. he might go abroad for his summer holiday. (so that)_7. he wasnt feeling well. he decided to stay home and not go to school. (since)_答案i. 1. so that 2. so 3. because4. since 5. so that 6. so that 7. in order that 8. thatii. 1. he went to bed because he was sleepy.2. as it was getting late, i turned around to start for home.3. since you cant answer, perhaps we should ask someone else.4. it was so interesting a book that he couldnt put it down.