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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,专题 状语从句,1,状语从句是如何出题的？,时间,/,条件,状语从句是关键,其他状语从句重点记忆连接词,2,什么是状语？,什么是从句？,状语是,修饰动词、形容词、副词等的句子成分。,说明时间、地点、原因、目的、结果、条件等。,可作状语的有：名词、副词、介词短语、不定式短语和从句等,必须符合“从句的三个必须”,必须是句子；必须有连接词；必须是陈述句,3,什么是状语从句？,用一个句子充当状语成分，那个句子就是状语从句。,I get up,at six,when it is dark.,I get up,at school,where I study.,4,状语从句,状语从句同,副词，介词词组,等作状语一样，用于,修饰谓语,，说明谓语动作的,时间，地点，方式，手段，条件，程度，比较，原因，目的，结果,等,I get up at 6:00,It is dark,I get up when it is dark,5,状语从句分类,表示时间,表示地点,表示原因,表示结果,表示目的,表示条件,表示让步,表示比较,返回,6,时间状语从句,I was watching TV at ten oclock yesterday.,I was watching TV when my mother got home.,-,时间状语,-,时间状语从句,7,时间状语从句的,引导,词,：,when,（,当,时候）,while,（,当,时候）,before,（在,之前）,after,（在,之后）,till/until,（直到）,as soon as,（一,就,），,as,（当,时,一边,一边,）,since,（从,以来）,by the time,（,当时候）,等引导。,8,在忘记之前,我要把它写下来。,我一到上海就会写信给你。,我们一直到雨停了才离开。,We did,nt,leave,until,the rain stopped.,As soon,as,I arrive in Shanghai,I will write to you.,Ill write it down,before,I forget it.,9,在时间状语从句里，当主句是一般将来时，,从句用一般现在时。,I,ll,ring you up,as soon as,I,get,to New York.,I,will,tell him everything,when,he,comes,back.,He,wont,believe it,until,he,sees,it with his own,eyes,.,10,考查,when,while,as,引导，,表示,“,当,时候,”,。,11,(1)when,意为,“,当,时,”,，,“,在,.,之后,”,，引导的时间状语从句表示主句的动作和从句的动作同时或先后发生。如：,I feel very happy when you come to see me.,你,(,们,),来看我时，我感到很高兴。（先后）,When you are crossing the street,you must be careful.,你,(,们,),过街道时，一定要小心。（同时）,1.when,的用法,12,(2)when,引导的时间状语从句中，可以用延续性动词，也可以用短暂性动词。如：,Someone knocked at the door when I was,sleeping,.,当我正在睡觉时，有人敲门。,(,延续性动词,),I will visit my good friend when I,arrive,.,当我到达时，我将去看望我的好友。,(,短暂性动词,),例：,_you smile at others,，,they will smile back.,A Before B When C Until D Though,B,13,注意：,when,也可以,作并列连词，表示一个动作正在进行的时候，突然间发生了另外一件事。如：,I was fishing by the river,when someone called for help.,我正在河边钓鱼，就在那时有人求救。,We were working in the chemistry lab,when the lights,went out.,我们正在化学实验室工作，突然灯都熄灭了。,14,while,意为,“,当,时,”“,在,期间,”,，引导的时间状语从句表示主从句的动作在同一时期发生，常用延续性动词或表示状态的词。如：,They rushed in while we were discussing problems.,当我们正在讨论问题时，他们冲了进来。,Father was cleaning the car while I was playing computer,games.,（,while,表示两个动作同时发生）,当我正在玩电脑游戏时，爸爸正在清洗汽车。,2.while,的用法,15,例：我吃饭时你可以去游泳。,You can go swimming while Im having lunch.,16,注意：,while,也可以作并列连词，表转折的关系，,相当于,but,，译为“然而”。如：,I like listening to music,while my brother likes doing sports.,我喜欢听音乐，而我的兄弟爱好运动。,17,as,引导时间状语从句时，,意为,“,正当，,一边,.,一边,，随着,”,等意思,(1),表示某事一发生，另一事情随即发生,As the sun rose the fog disappeared.,太阳一出来雾都消散了,(2),表示某事发生的过程中另一事发生,.,As he was speaking there was a loud explosion.,正当他在说话的时候，出现了一声巨响,.,(,从句用进行时态,),I heard the murmur of their voices as I crossed the hall.,我走过大厅的时候听到他们在嘀咕什么,.,(,两个动作都是一般时态,),3.as,的用法,18,(3),表示两个动作同时发生,.,He smiled as he passed.,他路过的时候笑了一下,.,（两个动作都是短暂的）,Helen heard the story as she washed.,海伦一边洗衣服一边听故事,.,（两个都是延续性动作）,He saw that she was smiling as he read.,他看到她一边看书一边笑,.,（两个都是延续性动作）,We get wiser as we get older.,我们随着年龄的增长而变得聪明起来,.,（随着时间的变化而变化）,19,答案,A,解析,答语中,when,引导了一个时间状语从句，主句用了一般将来时态，所以从句用一般现在时态，可见正确答案在,A,与,B,之中。既然答语用了时间状语来回答，可见问句询问的也一定是时间，从而确定正确答案为,A,。,【考例】,Mum,_ shall we have lunch?,We will have it when your dad_.,连云港,A,when,；,returns,B,where returns,C,where,；,will return,D,when,；,will return,20,4.,before,的用法,before,引导的时间状语从句通常表示主句的动作发生在从句的动作之前，反之则用,after.,可意为“在,之前”，根据具体语境还可理解：,“,还没,来得及,/,还没有,就,”,，,“,趁着还没,就,”,，,“,不知不觉就,，,才,”,等。,21,We cleaned the classroom before we left school yesterday.,昨天离开学校之前，我们打扫了教室。,He had been a cook before he went to college.,他上大学前曾当过厨师。,例：,You must make sure your tea is not too _,you drink it.,A before B after C since D while,C,22,答案,B,。,解析,这四个词,(,组,),都可以引导时间状语从句，,as soon as,一就,before,在之前；,after,在之后；,until,直到才。分析句子可以看出句意为“在你走之前把你的电子邮件地址给我好吗,?,”,【考例】,Could you please give me your e-mail address _you go?,昆明,A.as soon as B.before C.after D.until,23,5.,until,和,till,的用法：,(1),主句的谓语动词是延续性动词时，主句用肯定形式表示这一动作或状态一直延续到,until/till,所表示的时间为止,.,till,和,until,都表示,“,直到,”,，常可换用，但,till,不用于句首，也不可用于强调句,.,Ill stay here until you come back.,我会待在这里，直到你回来。,(,stay,表示的动作可以持续）,24,(2),主句谓语动词是,非延续性动词,时，用,否定形式,表示主句的谓语所表示的动作直到,until,所表示的时间才发生,.,构成句式,not.until.,，有时不用,not,，而用其他如,never,、,nothing,等表示否定的词,.,He didnt go to bed until/before he finished his homework,.,他直到做完作业才睡觉。,(,go to bed,表示的动作不能持续,),25,【考例,1,】一,Hurry up.The bus is coming,Oh,no.We mustnt cross the street _the traffic lights are green,福州,A,after B.since C.while D,until,答案,D,。,解析,本题应从句意人手。,until,常用于否定句中，构成,not,until,结构，意为“直到才”，该句意为“直到交通灯变绿，我们才能穿过马路”。,26,【考例,2,】,The kids didnt start to fly kites in the playground _the rain stopped.,A.if B.until C.whenever ,成都,答案,B,解析,not,until,直到才。“直到雨停孩子们才可以去操场放风筝”,。,27,【考例,3,】,Look,!Here comes our school bus.,No,hurry.Dont get on it,_it,has stopped.,安徽,A.until B.after C.since D.,when,答案,A,解析,句中有,dont,，可想,notuntil,为固定结构，意为“直到才”。,28,【考例,4,】,Julie didnt leave her office _ the police arrived.,A however B whenever C while D until,D,29,6.since,的用法：,(1)since,引导的时间状语从句，表示,“,自,.,以来,”,，主句用一般现在时或现在完成时，从句用一般过去时。,I have worked for this company since I graduated.,从毕业到现在，我一直在这家公司上班,例：,
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