条件状语从句课件.ppt
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1、Adverbial clauses定义定义:在复合句中由从句表示的状语称作状语从句,它可在复合句中由从句表示的状语称作状语从句,它可以用来修饰谓语(包括非谓语动词)、定语或状语,以用来修饰谓语(包括非谓语动词)、定语或状语,或是整个句子。或是整个句子。准确掌握每一个准确掌握每一个连词的含的含义是掌握状是掌握状语从句的关从句的关键。同时要注意主从句的时态呼应。同时要注意主从句的时态呼应。状语从句一般分为九大类状语从句一般分为九大类状语从句类别状语从句类别:时间状状语从句从句 地点状地点状语从句从句 原因状原因状语从句从句 目的目的状状语从句从句 结果状果状语从句从句 条件状条件状语从句从句 方式
2、状方式状语从句从句 比比较状状语从句从句 让步状步状语从句从句1.时间状语从句:时间状语从句:引导时间状语从句的连词有:引导时间状语从句的连词有:when,while,as,the moment,before,after,till,until,since,as soon as 等。等。请注意请注意 when,while,as 的区别的区别When -当当时候时候,通常指某一特定的时间点,主通常指某一特定的时间点,主句与从句的动作同时发生。句与从句的动作同时发生。When I opened the window,I saw him come up.When I have time,I will
3、go to see you.When I came home,I met an old schoolmate of mine.He said he would tell her about it when he saw her.*注意:注意:在时间状语从句中,主从句都是将来的动作或在时间状语从句中,主从句都是将来的动作或状态时,习惯上主句用将来时,从句用一般现在时。状态时,习惯上主句用将来时,从句用一般现在时。When-正在正在的时候,突然的时候,突然。通常主句是进行时。通常主句是进行时或或 be about to 时,在翻译的时候,时,在翻译的时候,when 可以译成没可以译成没想到或突然。
4、想到或突然。I was walking along the street,when I met him.I was about to fall asleep when my sister came in.One evening,little Hans was sitting near the fire when he heard a loud knock at the door.When 当从句是进行时,主句是一般时,往往表示当从句是进行时,主句是一般时,往往表示不满。不满。Someone knocked at the door when I was having breakfast.When
5、 I was leaving the house,the postman arrived.When the children had gone to bed,she began toprepare her lessons.When=afterWhile-在在期间,往往指一段时间。期间,往往指一段时间。While we were in America,we saw him twice.While we were talking,he came in.Strike while the iron is hot.While-表示一种不满情绪,意思是这边在干某种重表示一种不满情绪,意思是这边在干某种重要
6、的事,而另一边在享受等。要的事,而另一边在享受等。We are cleaning the classroom while they are playing the football.The soldier faces the powder while the beauty powder the face.While I am washing the floor,you can be cleaning the windows.As-一边一边一边一边,随着随着She was doing her homework as she was listening to the music.As she gr
7、ew older,she became more beautiful.As-当当时,指一个动作紧接着一个动作发生,时,指一个动作紧接着一个动作发生,从句通常用进行时。从句通常用进行时。As I was going out,it began to rain.I saw Mary as she was going on the bus.As he was eating his breakfast,he heard someone knock at the door.Someone patted me on the shoulder as I was standing before the shop
8、 window.The moment-一一就就 =as soon as,immediately,-Did you remember to give Mary the money you owed her?-Yes,I gave her the moment I saw her.Not until-直到直到才才He didnt leave the office until he finished the work.=He left the office when he finished the work.Not until 可以和可以和 when 互换互换Before-在在之前之前The pas
9、sengers should arrive at the airport an hour before the flight departs.Did you work as a stewardess before you come to this company?It was not long before I forgot it all.(It was/will be before 是常用句型是常用句型)He ran off before I could stop him.After-在在 之后之后The customer left the ticket counter after he h
10、ad a quarrel with the ticket agent.The plane took off after the air traffic controller gave clearance.Since-自从自从,通常主句用现在完成时通常主句用现在完成时I have never been there again since I graduated from the university.The captain has traveled almost everywhere in the world since he became a pilot.It is just a week s
11、ince we arrived here.(It is/has been since是常用句型)是常用句型)As soon as-一一就就Jack went to school as soon as he got well.Ill ring you up as soon as I get an answer from him.No sooner than-一一就就No sooner had he arrived than he went away again.no sooner than 用于句首要求倒装用于句首要求倒装Hardly whenScarcely whenOnce you see
12、him,you will never forget him.Once -一但一但就就Every time,each time 每次每次whenever 每当每当Each time he came to town,he would visit our school.Whenever we met with difficulties,they came to help us.2.条件状语从句条件状语从句引导状语从句的连接词有引导状语从句的连接词有:If,unless,as long as,in case,provided that,on condition thatIf-如果如果If you do
13、nt hurry up,you will miss the plane.If it snows tomorrow,the flight will be canceled.If you leave at 6 oclock tomorrow morning,youd better get to bed now.Unless-如果不如果不,除非除非=if notWe cant get there on time unless we book the earliest flight=We cannot get there on time if we dont book the earliest fli
14、ght.Dont trouble trouble unless trouble troubles you.He will not join us unless he changes his mind.As long as-只要只要We will succeed as long as we keep on trying.You cant play games as long as you remember the rules.A man is not old as long as he is seeking something.As(so)far as-据据所知所知As far as I kno
15、w,he speaks English very well.As/So far as I know,he is an expert on DNA.In case-假使假使,如果如果The plane cannot take off in case it rains.Send us a message in case you have any difficulty.Provided that 如果如果,有时省略有时省略 thatThe plane will be in good condition provided that it is taken care of carefully.You c
16、an become a stewardess provided that you are in good shape and you have got the proper education.On condition that-条件是条件是He said that he would come to the meeting on condition that no one asked him to speak.The mother promised to the son to buy him a toy airplane on condition that he passes his Engl
17、ish test.注注:主从句的动作发生在将来时,则主句用将来时主从句的动作发生在将来时,则主句用将来时,从从句用一般现在时。句用一般现在时。If he arrives tomorrow,I will be waiting for him at the airport.He said he would not leave unless it was fine next day.3.地点状语从句地点状语从句 地点状语从句只有两个连词地点状语从句只有两个连词:Where,whereverWhere-在在地方地方Put the medicine where you can easily get it
18、.Where that high building stands,there used to be some low,deserted houses.Where there is a will,there is a way.Wherever-无论哪里无论哪里He follows her wherever she goes.Wherever you are,I will be right there waiting for you.4.原因状语从句原因状语从句 because,as,since,now that,和和considering that,seeing that 这六个连词都用于表示表
19、示原因这六个连词都用于表示表示原因,但在但在语气上一个比一个弱语气上一个比一个弱.Because-因为因为,通常从句放在主句后通常从句放在主句后.Mr Smith was very upset because he couldnt find his luggage.He said that he couldnt work because the computer was out of order.I succeed because I willed it,I never hesitated.I do it because I like it.As-因为因为,通常放在句首通常放在句首As it
20、is quite windy today,he decidesAs he is honest and modest,all his friends like him.Since-既然既然 因语气较弱因语气较弱,常译为既然常译为既然Since everybody has come,we can set off.Since the purser didnt tell us what to do,we can relax.Now that-既然既然Now that you are here,you can join us.Now that all airlines offer discount pr
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- 条件 状语 从句 课件
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