lesson19.3原因等狀語從句.ppt

1、Adverbial clauses: cause, result and purpose,原因,結(jié)果和目的狀語從句,1.I went to the library because I was looking for a book about English.,2.As I havent studied, I wont pass this exam.,3.Since you dont know any French, you wont understand this film.,4.You must study hard, for you are a student.,一.原因狀語從句:在整個句

2、子中表示原因的狀語從句 叫原因狀語從句.引導(dǎo)原因狀語從句的從屬連詞有 because,as,since和并列連詞for.注意以下幾點:,1.這幾個從屬連詞中,語氣最強的是because. 在回答問題時,只能用because引導(dǎo)原因狀語從句.如:,你昨天為什么沒有來上課? 因為我病了.,Why didnt you come to school yesterday?,Because I was ill.,2.for 在四個從屬連詞中語氣最弱,它通常用來表示 一個補充說明的理由.它引導(dǎo)的狀語從句只能位于句末. 如:,昨天晚上一定下了雨,因為地上是濕的.,It must have rained las

3、t night, for the ground is wet.,3.特別要注意的是,表示原因的連詞不可與并列連詞so同 時使用在一個句子中.如:,因為昨天雨下得很大,所以我沒有去看電影.,Because it rained heavily yesterday, (so) I didnt go to the cinema.,x,1.It is so cold that the lake has frozen over.,2.She was in such a hurry that she forgot to turn off the light in the house.,3.He is suc

4、h a young boy that he cant go to school by himself.,二.結(jié)果狀語從句:結(jié)果狀語從句的兩個常用結(jié)構(gòu)是 suchthat和so that.這兩個句型都可來表示 “如此.以致于”.so 的后面接形容詞或者副詞, such的后面則要接名詞.具體來說,使用這兩個結(jié)構(gòu)時, 應(yīng)注意:,在sothat 這個句型中,so的后面常接: 1.形容詞/副詞: 如:他太小了,還不能參軍.,He is so young that he cant join the army.,他跑得太快了,沒有一個人能趕得上他.,He runs so fast that no one c

5、an catch up with him.,2.形容詞+不定冠詞+單數(shù)名詞.如: 他很誠實,我們都很信任他.,He is so honest a boy that we all believe him.,3.表示數(shù)量的形容詞(much,little, few,many)+ 復(fù)數(shù)名詞或不可數(shù)名詞.如:,他從來就沒有見過這么多錢,以致于不知道該怎么辦才好. 我從沒有見過這么多美麗的鮮花,我?guī)缀醪荒芡白咭徊?,He had never seen so much money that he didnt know what to do.,I had never seen so many beautif

6、ul flowers that I can hardly move a step forward.,在suchthat 這個句型中,such后面常接: 1.不定冠詞+形容詞+單數(shù)名詞 如:天氣太冷了,沒有幾個人在大街上走.,It was such a cold day that few people were walking in the stereet.,2.形容詞+復(fù)數(shù)名詞或不可數(shù)名詞 如:它們都是如此有趣的書,以致于我很難放下.,They are all such interesting books that I can hardly put them down.,天氣如此炎熱,很多人都

7、下河游泳去了.,It was such hot weather that many people went swimming in the river.,1.He is studying hard so that he can become a doctor.,2.She gets up early in order that she can take the earliest bus.,三.目的狀語從句:目的狀語從句表示主句部分的目的. 引導(dǎo)目的狀語從句的從屬連詞有so that,in order that. 使用目的狀語從句,因注意以下幾點: 1.目的狀語從句中的謂語動詞常常與情態(tài)動詞 can, be able to連用.如: 他很早就起床了,以便能夠準(zhǔn)時到校.,He got up early so that he could get to school