（精心整理）狀語的具體講解(四)原因狀語

1、句子成分之狀語的具體講解（四）原因狀語導(dǎo)讀：原因狀語解釋了主語的動作或者狀態(tài)。 1. 介詞短語做狀語2. 形容詞做狀語3. 分詞做狀語 4. 狀語從句（區(qū)分了 because, since, for, as的用法）1. 介詞短語做原因狀語： because of , due to, on the account of, owing to, as a result of 等詞可以引導(dǎo)原因狀語，后面需要接：名詞（詞組），代詞， 動名詞。（接名詞）Newton discovered gravity due to an apple. 牛頓因為一個蘋果發(fā)現(xiàn)了萬有引力。（接名詞詞組）He cant for

2、get the past because of the old days with his wife. 他忘不掉過去是因為忘不掉和他妻子一起度過的陳年往事。（接代詞）My mom disagreed with my decision. As a result of this, I changed my major. 我媽媽不同意我的決定。 因此，我換了個專業(yè)。（接動名詞）On the account of loosing old friends, he cant focus on the study. 由于失去了老朋友，他沒辦法再專注于學(xué)習(xí)。because of , due to, on th

3、e account of, owing to 基本相同 ，可用在句首或者句尾，其中owing to在用在句尾的時候前面要加“逗號”，because of更傾向口語Because of my bad leg ,I couldnt walk so fast as the others.由于我的腿壞了，我不能像其他人走得那么快。Owing to his careless driving, we had a bad accident.由于他駕駛疏忽,我們發(fā)生了次大車禍.Your failure is due to negligence.你的失敗是由于疏忽所造成的.2. 形容詞做原因狀語形容詞做原因狀語

4、時，表示的是一種狀態(tài)做原因。Thirsty, he went to the teahouse for a drink first. 因為渴了，他先到茶社里去喝點水。Afraid of being late, they came by taxi. 因為怕遲到，所以他們坐出租車來的。3. 分詞短語做原因狀語分詞短語在句首時，經(jīng)常表示原因狀語 Not having got enough hands, we had difficulty in completing the work in time. 由于人手不夠，我們很難按時完成任務(wù)。Excited at the moment, she went t

5、o London alone. 由于心血來潮，她獨自去了倫敦。Sent back home, the old man got to calm down. 因為被送回了家，老人才慢慢平靜了下來。4. 從句作原因狀語引導(dǎo)原因狀語從句的從屬連詞有because（因為）, as（由于）, since（既然）, now(that)（既然）, when（既然）, seeing (that) （由于，鑒于）, considering (that)（考慮到）, given (that) （考慮到）,for（為）等（1）because引導(dǎo)的原因狀語從句一般放于主句的后面，because從句位于句首時要用逗號分開

6、，放在句末 時，可不用逗號分開。because表示直接原因， 語氣最強， 最適合回答why引導(dǎo)的疑問句。例如：I do it because I like it.我做這件事是因為我喜歡。You can trust those products because the quality never varies.你可以信賴那些產(chǎn)品，因為它們的質(zhì)量從來不變。We went by bus because it was cheaper.我們乘公交汽車去，因為這樣便宜一些。注意： “not . because”結(jié)構(gòu)中的not否定的是because引導(dǎo)的整個從句，例如：誤：The country is no

7、t strong because it is large.正：The country is strong not just because it is large.國強不在大。I didn't help him,not because I was unwilling,but because I was unable to do it.我沒有幫助他，不是因為我不愿意，而是因為我力不從心。2. since引導(dǎo)的原因狀語從句一般放于主句之前表示已知的、 顯然的理由(通常被翻譯成“既然”)， 較為正式， 語氣比because弱。例如：Since you are free today, you

8、had better help me with my mathematics.既然今天你休息， 你最好幫我補習(xí)數(shù)學(xué)。Since you don't trust him,you should not employ him.你既然不信任他，你就不該雇用他。注意： seeing (that)， now (that)， considering (that)， in that這幾個詞匯與since引導(dǎo)的原因狀語從句意思相近， 都表示“既然”。例如：Seeing (that) he refused to help us, theres no reason that we should now he

9、lp him.他既然曾經(jīng)拒絕幫助我們， 我們沒有理由要來幫助他。Now (that) you are grown up, you should not rely on your parents.既然你長大了， 就不應(yīng)該依靠你的父母了。Considering (that) everybody is here, lets begin our discussion.既然大家都到了， 我們就開始討論吧。In that he is ill, he feels unable to do it.因為他生病了，他覺得做不了那件事。3. as 引導(dǎo)原因狀語從句時表示附帶說明的“雙方已知的原因”， 語氣比sinc

10、e弱， 較為正式， 位置較為靈活(常放于主句之前)。例如：As it is raining, youd better take a taxi.既然在下雨， 你最好乘出租汽車。As you are tired, you had better rest.既然累了， 你最好休息一下。I went to bed early, as I was exhausted.我睡得早， 因為我已筋疲力盡了。4. for引導(dǎo)的是并列句表示原因但并不說明主句行為發(fā)生的直接原因， 只提供一些輔助性的補充說明， for引導(dǎo)的并列句只能放于主句之后并且必須用逗號將其與主句隔開。例如：He could not have seen me, for I was not there.他不可能見過我， 因為我不在那里。He seldom goes out now,for he is very old.他難得出門了，因為他年事已高。I do it because I like it. 因為我喜歡，我就做了。Since no one is against it, lets make a decision. 既然沒