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1、安全教育学习是提高员工安全防范意识的重要措施。“百日安全活动”开展以来，保卫部从自身着手对本部门所有员工开展集中安全教育培训Module 4 Music Born in America Section Grammar-时间状语从句和省略语法图解探究发现Some of the DJs began speaking and shouting while the music played.The moment I heard it, I knew it was a completely new kind of music.The first time that rap artists recorde
2、d their music, musicians recorded the backing tracks (the music without the singing) in the studio and the rappers added their vocals later.No sooner had he reached home than it began to rain.Hardly had I entered the room when the phone rang.Do you want to go to the movie tonight?I hope to (go to th
3、e movie)What do you think of the film (that) you saw yesterday?While (I was) at college, I began to know him, a strange but able student.Bob has done his homework, but Tom hasnt (done his homework)He accepted the suggestion that he (should) go there by train.我的发现(1)句中黑体部分在句中引导时间状语从句，句为省略句。(2)句为no so
4、oner . than . /hardly . when .句式，表示“一就”，且no sooner/hardly位于句首时，主句要用倒装语序。(3)句是不定式的省略，省去了to后面的动词(短语)。(4)由句可知，关系词在定语从句中作宾语时可以省略。(5)句中，从句主语与主句主语一致，且从句中包含be动词的某种形式，可以将从句的主语和be动词同时省略。(6)句是情态动词should的省略；句省略了部分谓语及宾语。一、时间状语从句在复合句中起时间状语作用的句子称为时间状语从句。时间状语从句常用when, while, as, until, since或表示时间意义的名词短语等引导。1when,
5、while, as的用法连词用法when从句谓语用延续性动词和非延续性动词均可，主、从句谓语表示的动作可同时或先后发生while从句谓语用延续性动词表示两个延续性动作同时发生且具有对比意味，或一个动作发生在另一个动作进行的过程中as强调主、从句动作同时发生表示“一边一边”之意He was nine when his father died.他父亲去世时他才九岁。Jack was working in the lab when the power cut occurred.(2016北京高考改编)杰克正在实验室里工作，这时突然停电了。They arrived while we were havi
6、ng dinner.他们到时我们正在吃晚饭。While I played the piano, my sister did her homework.我弹钢琴的时候姐姐在做作业。As years go by, China is getting stronger and richer.随着时间一年一年过去，中国变得越来越富强了。I saw my mother as I was getting off the bus.我下公共汽车的时候看见了我妈妈。名师点津when在be about to do . when ., be doing . when ., had done . when ., be
7、on ones way . when ., be on the point of doing . when .等结构中，作“正在那时”讲，表示某个动作正在发生或刚刚发生，另一动作同时发生。He was about to leave when someone knocked at the door.他刚要离开就有人敲门。即时演练1(1)选词填空：when, while, asIts much easier to make friends when you have similar interests.While/When in Vienna he studied music.You will g
8、row wiser as you grow older.(2)完成句子I was_about_to_go_to_bed_when the telephone rang.我正要睡觉时电话铃响了。They were_watching_TV_when_they learned that the plane was out of touch.他们正在看电视，这时得知飞机失去联系。He had_just_left_when you came.他刚离开，你就来了。He dropped the glass as_he_stood_up.他站起来时，把杯子摔了。2until, till的用法主句形式主句谓语意
9、义肯定句用延续性动词意为“直到为止”，表示主句中的动作到从句动作发生时结束否定句用短暂性动词意为“直到才”，表示主句中的动作到从句动作发生时开始He waited until she had finished speaking.他一直等到她讲完。You cant go home until you finish your work.工作完成后你才能回家。名师点津(1)置于句首或在强调句中时常用until，其他情况until和till可通用。Until you told me I had no idea of it.直到你告诉我，我对此事才有所了解。(2)如果将“not until .”结构放在
10、句首，那么主句要部分倒装。Not until his bike looked almost new did he stop cleaning it.直到他的自行车看起来几乎像新的一样，他才停止擦洗。即时演练2(1)句型转换I didnt go to bed until I finished my work.Notuntil I finished my work did I go to bed.(2)完成句子You can stay_here_till/until the rain stops.你可以在这里待到雨停。They didnt_stop_talking_until the teache
11、r came in.直到老师进来，他们才停止说话。Not until we pointed out their faults to them did_they_realize_them.直到我们向他们指出了他们的错误，他们才意识到。3before, since的用法(1)before意为“在之前”，置于主句前后均可。Before the sun sets, we must go home. 太阳落山前，我们必须回家。如果before引导的从句位于主句之后，有时不能译成“在之前”，而要译成“过了多久才，还未就”等。The struggle lasted four years before the
12、 North won in the end.斗争持续了4年北方才最终获胜。He almost knocked me down before he saw me.他几乎撞到我时才看见我。She left before I could have a word with her. 我还没来得及和她说句话，她就离开了。before常用句型：It will be two years before he leaves the country.再过两年他才会离开这个国家。It was two years before he left the country.过了两年他才离开这个国家。(2)sincesinc
13、e意为“自从”时，所引导的从句使用非延续性动词，主句使用完成时态。Since he graduated from college, he has worked in this city.大学毕业后，他便在这个城市工作。since的常用句型：从句用短暂性动词表示动作持续了多久，用延续性动词表示动作停止了多久It is five days since he came here.他来这儿5天了。It was three years since she had lived in this city.她已有三年不住在这个城市了。即时演练3(1)选词填空：since, beforeI have writt
14、en home once since I came here.Time passed quickly and the winter holidays had gone by before we knew it.They worked long hours for several weeks before everything returned to normal.(四川高考改编)As is reported, it is 100 years since Qinghua University was founded.(2)用所给词的正确时态填空It will_be (be) one year b
15、efore we graduate from the middle school.It is/has_been (be) three years since he lived here.It was (be) not long before we met again.It was five years since we had_left (leave) school.4表示“一就”的引导词引导时间状语从句，表示“一就”之意的引导词有as soon as, immediately, directly, instantly, no sooner . than ., hardly . when .等。另外，名词短语the moment, the minute, the instant, the day (year)等均可用作连词来引
