新状语从句课件公开课ppt.ppt
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1、 专题句型专题句型状语从句状语从句考点揭密考点揭密考点设置考点设置典型例题解析典型例题解析课时训练课时训练考点揭密考点揭密 在复合句中修饰主句中的动词、形容词或副词,在复合句中修饰主句中的动词、形容词或副词,起状语作用的从句叫状语从句。状语从句可置主句之起状语作用的从句叫状语从句。状语从句可置主句之前,也可置主句之后。前,也可置主句之后。前置时,从句后用逗号与主句前置时,从句后用逗号与主句分开;分开;后置时,与主句之间无标点符号。后置时,与主句之间无标点符号。状语从句可分为状语从句可分为时间、原因、目的、结果、条件、时间、原因、目的、结果、条件、比较、地点、比较、地点、让步、方式让步、方式等九
2、类。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.复合句由一个主句(Principal Clause)和一个或一个以上的从句(Subordinate Clause)构成。主句是全句的主体,通常可以独立存在;从句则是一个句子成分,不能独立存在。从句不能单独成句,但它也有主语部分和谓语部分,就像一个句子一样。所不同在于,从句须由一个关联词(connective)引导。g考点设置考点设置1.时间状语从句时间状语从句(1)引导词:
3、引导词:when,while,as,before,after,as soon as,until/till,since.注意:注意:a.while所引导的时间状语从句中的时态常用所引导的时间状语从句中的时态常用进行进行时态时态。如:。如:When/While he was eating his breakfast,he heard the doorbell ring.While he was watching TV,the boy fell asleep.b.as则强调主句和从句的动作在同一时间进行则强调主句和从句的动作在同一时间进行(一一边边.一边一边);也可表示也可表示“随着随着”.She
4、sang as she walked along.As the election approached,the violence(暴行)(暴行)got worse.c.since从句中用一般过去时,主句用现从句中用一般过去时,主句用现在完成时。在完成时。Its/It has been+一段时间一段时间+since+时间状语从句时间状语从句”中,译作中,译作“自从自从以来以来,已经已经(时间时间)了了”d.as soon as遵循遵循“主将从现主将从现”的原则。的原则。主主句句中若用中若用一般将来时一般将来时,从句从句则用则用一般一般现在时现在时表示将来表示将来.小结:小结:till,until
5、和和notuntil:1.until/till从句用于肯定句时,从句用于肯定句时,主句的动词主句的动词 是延续性动作,意为是延续性动作,意为“某动作一直延续到某时间点才停某动作一直延续到某时间点才停 止止”。如:。如:We waited until/till he came.(wait 是延续性动词)是延续性动词)2用于否定句时,主句谓语动词是非延续性动词,意为用于否定句时,主句谓语动词是非延续性动词,意为“某动作直到某时间才开始某动作直到某时间才开始”。此时此时till/untill可用可用before代替代替如:如:He wont go to bed until her father re
6、turns.3till不可以置于句首,而不可以置于句首,而until可以。如:可以。如:Until you told me I had no idea of it.4notuntil句型中的强调和倒装说法:句型中的强调和倒装说法:It was not until you told me that I had any idea of it.Not until you told me did I have any idea of it.practice:1.I will go to bed as soon as I _my homework.A.will finish B.finishing C.
7、finishC 4.I will not watch TV until I finish my homework.=I will not watch TV _ I finish My homework.before2.My sister _(read)her bookin the classroom when her teacher came in.was reading3.I my_(do)homework while my parents_(watch)TV last night.was doingwere watching (2)遵循遵循“主将从现主将从现”的原则的原则,(即主句若为一般
8、将来时,即主句若为一般将来时,从句用一般现在时代替将来。从句用一般现在时代替将来。)2.条件状语从句条件状语从句(1)引导词:引导词:if,unless(=if.not).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,它引导条件状语从句,译作是从属连词,它引导条件状语从句,译作“除非除非否则的话否则的话”、如果如果.不不”e.g.You will be late for class unless you start right now.除非除非你现在出发你现在出发
9、否则的话否则的话年上学就会迟到的。年上学就会迟到的。e.g.You will not succeed unless you work hard.考点设置考点设置3.原因状语从句原因状语从句(1)引导词引导词:because,since,as.(2)对对because 原因状语提问用原因状语提问用“why”。(3)because 不能与不能与so连用。连用。(4)because,since,as,for的区别: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从句所表示的是对方不知道
10、的道的直接的原因直接的原因,因此在回答以,因此在回答以why引引导的特殊疑问句导的特殊疑问句时时只可用只可用because,它引它引导的从句可以位于主句前或主句后导的从句可以位于主句前或主句后.而而as,since 引导的从句却不可;引导的从句却不可;例句例句:Li Hong didnt go to school yesterday,because he was ill.as从句所表示从句所表示比较明显的原因和理由比较明显的原因和理由(由于由于,既然既然)这种原因一般是这种原因一般是大家知道大家知道的的,一般一般从句说明原因从句说明原因,主句说明结果主句说明结果。其。其从句位于主句之前从句位于
11、主句之前,since用来表示比较勉强的理由和原用来表示比较勉强的理由和原或原由已为人们所或原由已为人们所知。知。e.g.As the water was not deep,we were able to cross the river.(从句说明原因从句说明原因,主句说明结果主句说明结果)e.g.AS I knew he was ill,I didnt call him.e.g.Since everybody is here,lets bigin the meeting(“大家都在这里大家都在这里”的原由已为人们所知)的原由已为人们所知)e.g.Since you cant answer th
12、e question,(原由已为人们所知)(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。往往用于附加理由证明。所说的理由是一种补充说明。分句前常有逗号分句前常有逗号,其引导的其引导的分句不可放于句首分句不可放于句首。例句:例句:Its spring now,for the flowers are out.Practice:1.Why hasnt Mr.Li come to work today.-_he has gone to Beijing to have a meeting.A.If B.Until C.Though D
13、.Because2.I decided to stop and have lunch,_ I was feeling quite hungry.A.Because of B.for C.AsDB3.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 stayed at home because the weather was bad.()C.I stayed at home because of the bad weather A
14、()AFTT考点设置考点设置例句例句:She is so great a father that we all like him.4.目的状语和结果状语目的状语和结果状语(1)目的状语从句目的状语从句引导词:引导词:so that从句中常用从句中常用情态动情态动词词(can/could)E.g.Speak slowly so that we can understand you.(2)结果状语从句结果状语从句引导词:引导词:so+adj+that,such+n+thatso+adj+a+n(名单名单)+that例句例句:It is so red an apple that I want to
15、eat it.so+adj+an+n(名单名单)+that(3)so与与such的区别的区别 She is such a great father that we all like him.such+a+adj+n(名单名单)+thatIt is such an red apple that I want to eat it.such+an+adj+n(名单名单)+that小结小结:so+adj+a/an+n(单数)单数)+that such+a/an+adj+n(单数)单数)+that1.It is _small a room _it cant hold so many People.A.s
16、o that,B.suchthat=It is _ a small room _it cant hold so many People.A.so that,B.suchthat Practice:AB2.He is _young a boy_ he cant carry the box.He is _ a young boy _ he cant carry the box.A.so that,A.suchthat例句例句:It is such fine weather that people can go swimming.such+adj+n(不可数不可数)+that例句例句:There a
17、re such beautiful flowers that we want to Pick it.such+adj+n(pl)+that小结小结 such+adj+un/n(pl)+thatABI have so little money that I cant buy the book.We have so many friends that we feel happy.We have so much homework that we tired.小结小结:一般情况下一般情况下,suchthat结构中用名词结构中用名词,但是但是,如果名词是用如果名词是用little,few,many,mu
18、ch等等 修饰时修饰时,要用要用so来表示来表示.“如此如此”so little(如此少如此少)+u so few (如此少如此少)+cn so many(如此多如此多)+cn so much(如此多如此多)+u注意注意:little 若放在可数名词前若放在可数名词前,译作译作“小小”,而不是而不是“少少”要用要用such来表示来表示.Review:so+形形+a/an+名名(单数单数)such+a/an+形形+名名(单数单数)so+many/much/few/little+形形+名名 such+形形+不可数名词不可数名词/可数名词复数可数名词复数 Practice:1.Mary had _t
19、o do that she was busy all day.A.So many work B.such much workB.2.They were _little boys that they couldntC.go to school.A.so B.suchD.3.All of us feel surprised that he was _little boy E.eat_ _muchF.food.A.so,so B.such,soBBsuchso(4)so.that与与too.to和和.enough to间转换间转换 tooto 可与可与not enough注意注意:1.所修饰词和所修
20、饰的词是一对反义词所修饰词和所修饰的词是一对反义词.2.转换时转换时too放在所修饰词之前放在所修饰词之前.too+adj enough放在所修饰词之后放在所修饰词之后.adj+enoughe.g.The boy is so young that he cant go to school.=The boy is too young to go to school.=The boy is not old enough to go to school.Practice:1.The room is small hold so many people.2.=The room is to hold so
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