as與which的區(qū)別PPT優(yōu)秀課件

1、1、從句位置不同、從句位置不同 as : 句首、中、后句首、中、后 which ：主句或先行詞之后，不位于句首：主句或先行詞之后，不位于句首 1) She told me she won the match , which was a lie. 2)As is known to all, fish cant live without water. 3)Air, as we know, is gas. 4)He was a doctor, as I knew from his manner. 一、一、as和和which引導非限定性定語從句的引導非限定性定語從句的區(qū)別區(qū)別 2、所指不同、所指不同

2、as : 指代整個主句指代整個主句 which：指代整個主句，主句中的某個單詞：指代整個主句，主句中的某個單詞 1) Mike, as we expected, attended the meeting. 2) Beijing , which he was born in, is our capital. 3、as，which引導的從句中引導的從句中謂語動詞不同謂語動詞不同 as : 系動詞（系表結(jié)構(gòu)或被動語態(tài)）系動詞（系表結(jié)構(gòu)或被動語態(tài)） which：系動詞，行為動詞：系動詞，行為動詞 1) He didnt say anything at the meeting , as/which wa

3、s (seemed) very strange. 2) He saw the girl, which made him happy. 4、as引導的定語從句表示引導的定語從句表示正如正如.那樣那樣， 固定搭配：固定搭配： as is often the case as has been said before as is mentioned above as was expected as we can see as we all know as often happens as might be imagined Kate was late for school , as often hap

4、pened. 正如正如那樣那樣 5、as引導的從句引導的從句語義語義與主句與主句一致一致, which無此限制無此限制 She has married again, which/as was expected. She has married again, which was unexpected. 先行詞前有先行詞前有the same, such ,as ,so修飾修飾 1)There are as many dictionary as are needed. 2) Such women as knew Tom thought he was charming. 3) He is not so

5、 kind a man as I expected. 4)We are facing the same problems as we did years ago. 二、二、as引導的限定性定語從句引導的限定性定語從句 注意區(qū)別： the same.as 相同物體相同物體 the same.that 同一物體同一物體 She wore the same dress as her younger sister wore. She wore the same dress that she wore at Marys wedding. such/soas 定語從句，定語從句， as 作主語，賓語作主語

6、，賓語 such/so that 結(jié)果狀語從句，結(jié)果狀語從句，that不做成分不做成分 He lifted so heavy a stone as no one else can lift. He is so young a boy that he cant go to school. （2015 江蘇）江蘇）The number of smokers, is reported, has dropped by 17 percent in just one year. A.it B.which c.what D.as 句意：正如所報道的那樣，吸煙的人數(shù)僅在一年內(nèi)就已經(jīng)句意：正如所報道的那樣，吸煙

7、的人數(shù)僅在一年內(nèi)就已經(jīng) 減少了百分之十七。減少了百分之十七。 as 有有正如正如.那樣那樣的意思。的意思。 高考題： （2013, 山東）山東）Youll find taxis waiting at the bus station you can hire to reach your host family. A.which B.where C.when D. as 句意：你會發(fā)現(xiàn)出租車在車站等候，你可以租一輛到你句意：你會發(fā)現(xiàn)出租車在車站等候，你可以租一輛到你 的寄宿家庭。本題考查限制性定語從句的寄宿家庭。本題考查限制性定語從句 as 引導限定性定語從句，先行詞的前面常有引導限定性定語從句，先行詞的前面常有the same, such ,as ,so修飾修飾 總結(jié)：總結(jié)： 1 1、位置位置不同不同 2 2、所指所指不同不同 非限定性定語從句非限定性定語從句 3