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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
2、点设置,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,
3、he was 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 h
4、im when 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.
5、（leave是个短暂性动词）,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 book in the classroom when her teacher came in.,was reading,3
6、.I my_ (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 “
7、除非否则的话”,e.g. 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, y
8、ou will fail the 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 sh
9、opping,wont be,3.Please 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
10、 young trees as often 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
11、在回答以why引导的特殊疑问句时只可用because,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)
12、,e.g. AS I knew he was 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
13、hasnt Mr. Li come to work today. - _he has gone to Beijing to have a meeting. A.If B.Until C. Though D. Because 2. 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
14、 weather was bad. ( ) B. I stayed 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
15、状语从句引导词： so + adj + that, such + 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 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 b
