初中英语语法1初中英语状语从句精讲ppt课件.ppt
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1、专题句型状语从句,考点揭密中考考点设置典型例题解析课时训练,考点揭密,在复合句中修饰主句中的动词、形容词或副词或句子,起状语作用的从句。由从属连词引导,从属连词在从句中不充当句子成分。状语从句可置主语之前,也可置主语之后。前置时,从句后用逗号与主句分开;后置时,与主句之间无标点符号。 状语从句可分为时间、原因、目的、结果、条件、 比较、地点、让步、方式等九类。,e.g. If you go to the party, you will have a good time. e.g. You will have a good time If you go to the party.,中考考点设置,
2、1.时间状语从句(1)引导词:when, while, as, before, after, as soon as, until/till, since.,e.g. Mother was cooking dinner when I reached home.( when “当的时候”),e.g. While the girl was shopping, the UFO landed. ( While “当的时候”),e.g. Dont close the window before you go to bed.(before 在之前),e.g. As he was reading, he wa
3、s listening to the radio.(As “一边一边”),e.g. After I had done my homework, I went to bed.,e.g. The Greens has lived here since they came to China.(since 引导的时间壮 语从句若用一般过去时,主句则用现在完成时,时间壮语从句中若用一般将来时,从句 则用一般现在时表示将来,即遵循“主将 从现”的原则。,e.g. I will write to you as soon as I get to Beijing.,e.g. I will tell him wh
4、en he comes back.,注意,e.g. I wont go to bed until I finish my homework.,(3)not.until的同义句替换。 notuntil在否定句中表示“直到才”,主句中的动词常用终止性动词, 这时till/until可用before替换, till/until 在肯定句中表示“直到为止”主 句中动词用延续性动词 e.g. I waited till / until he arrived. (wait是一个延续性动词),e.g. I didnt leave until/till/before she came back.(leave是
5、个短暂性动词),practice:,1. I will go to bed as soon as I _my homework. A. will finish B.finishing C. finish,C,4. I will not watch TV until I finish my homework . =I will not watch TV _ I finish My homework .,before,2.My sister _(read)her bookin the classroom when her teacher came in.,was reading,3.I my_ (
6、do)homework while my parents_(watch) TV last night.,was doing,were watching,(3)if.not与unless(=ifnot) 及or的同义句转换。,(2)遵循“主将从现”的原则, (即主句若为一般将来时,从句用一般现在时代替将来。),2.条件状语从句(1)引导词:if,unless.,e.g. If I am free, I will call you.,e.g. If it doesnt rain, we will go for a walk.,unless是从属连词,它引导条件壮语从句,译作“除非否则的话”,e.g
7、. You will be late for class unless you start right now.除非你现在出发否则的话年上学就会迟到的。 e.g. You will not succeed unless you work hard.,小结:“祈使句+or+一般将来时的陈述句”结构中,Or表示转折,译作“否则,不然的话”相当于一个否定的条件状语从句。相当于If you dont(cant), you will,例句. Study harder,or you will fail the exam.=If you dont study harder, you will fail th
8、e exam.=Unless you study harder, you will fail the exam.,例句. Hurry up, or you will be late.=If you dont hurry up, you will be late.=Unless you hurry up, you will be late.,practice:,1. If you _ to the party, you_ have a good time.,go,will,2. She _next Sunday if she_ busy.,will go shopping,wont be,3.P
9、lease hurry up, or you will miss the train.=_you _ hurry up, you will _ the train.=_ you hurry up, you will miss the train.,4.Water the young trees as often as Possible,or they will die soon. =_you _ water the young trees as often as possible, they will die soon. =_ you water the young trees as ofte
10、n as possible, they will die soon.,If,dont,Unless,If,dont,Unless,miss,中考考点设置,3.原因状语从句,(1)引导词:because, since, as.,(2)对because 原因状语提问用“why”。,(3)because 不能与so连用。,(4)because,since,as,for的区别:,Why are you standing here? -Because Im waiting for my uncle., because 从句所表示的是对方不知道的直接的原因,因此在回答以why引导的特殊疑问句时只可用bec
11、ause,它引导的从句可以位于主句前或主句后. 而as,since 引导的从句却不可;,例句: Li Hong didnt go to school yesterday,because he was ill., as从句所表示比较明显的原因和理由(由于,既然)这种原因一般是大家知道的,一般从句说明原因,主句说明结果。其从句位于主句之前, since用来表示比较勉强的理由和原或原由已为人们所知。,e.g. As the water was not deep, we were able to cross the river.(从句说明原因,主句说明结果),e.g. AS I knew he was
12、 ill, I didnt call him.,e.g. Since everybody is here, lets bigin the meeting (“大家都在这里”的原由已为人们所知),e.g. Since you cant answer the question,(原由已为人们所知)Ill ask someone else.,for往往用于附加理由证明。所说的理由是一种补充说明。分句前常有逗号,其引导的分句不可放于句首。例句:Its spring now, for the flowers are out.,Practice:Why hasnt Mr. Li come to work
13、today.- _he has gone to Beijing to have a meeting. A.If B.Until C. Though D. Because2. I decided to stop and have lunch, _ I was feeling quite hungry.Because of B. for C. As,D,B,3.Because he was ill, he didnt_ go to school. A. so B. /,4.A. I stayed at home because of the weather was bad. ( ) B. I st
14、ayed at home because the weather was bad. ( ) C. I stayed at home because of the bad weather A ( ),A,F,T,T,中考考点设置,例句: She is so great a father that we all like him.,4.目的状语和结果状语(1)目的状语从句引导词:so that从句中常用情态动词(can/could) E.g. Speak slowly so that we can understand you.(2)结果状语从句引导词: so + adj + that, such
15、 + n + that,so,+adj,+a,+n(名单),+that,例句: It is so red an apple that I want to eat it.,so,+adj,+an,+n(名单),+that,(3)so与such的区别,She is such a great father that we all like him.,such,+a,+adj,+n(名单),+that,It is such an red apple that I want to eat it.,such,+an,+adj,+n(名单),+that,小结: so+adj+a/an+n(单数)+that
16、such+a/an+adj+n(单数)+that,1.It is _small a room _it cant hold so many People. A. so that, B. suchthat =It is _ a small room _it cant hold so many People. A. so that, B. suchthat,Practice:,A,B,2.He is _young a boy_ he cant carry the box.He is _ a young boy _ he cant carry the box. A. so that, A. sucht
17、hat,例句:It is such fine weather that people can go swimming.,such,+adj,+n(不可数),+that,例句: There are such beautiful flowers that we want to Pick it.,such,+adj,+n(pl),+that,小结 such+adj+un/n(pl)+that,A,B,I have so little money that I cant buy the book.,We have so many friends that we feel happy.,We have
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