引導原因狀語從句的連詞

1、原因狀語從句表原因,以下逐一介紹常見的原因狀語從句的引導詞:1. because引導的原因狀語從句一般放于主句之后,because表示直接原因,語氣最強,最適合回答why引導的疑問句。例如:I do it because I like it. 我做這件事是因為我喜歡。注意:“not . because”結構中的not否定的是because引導的整個從句,例如:The country is not strong because it is large. 國強不在大。2. since引導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

2、如:Since you are free today, you had better help me with my mathematics. 既然今天你休息,你最好幫我補習數(shù)學。注意:seeing (that,now (that,considering (that,in that這幾個詞匯與since引導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 help him. 他既然曾經拒絕幫助我們,我們現(xiàn)在沒有理由要來幫助他。/ Now (that you

3、 are grown up, you should not rely on your parents. 既然你長大了,就不應該依靠你的父母了。/ Considering (that everybody is here, lets b egin 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. 因為有病,他覺得做不了那件事。3. as 引導原因狀語從句時表示附帶說明的“雙方已知的原因”,語氣比since弱,較為正式,位置較為靈活(常放于主句之前。例如:As it is raining,

4、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,因為我筋疲力盡了。4. for引導的原因狀語從句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引導的原因狀語從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?？碱}

5、1_ youve got a chance, you might as well make full use of it. (1999A. Now thatB. AfterC. AlthoughD. As soon as答案A解析主句與從句之間存在因果關系,且“youve got a chance”表示一個顯而易見的原因,因此應選用表原因的now that?？碱}2He found it increasingly difficult to read, _ his eyesight was beginning to fail. (2006北京A. andB. forC. butD. or答案B解析

6、“his eyesight was beginning to fail”是“he found it increasingly difficult to read”的原因,因此本題應選用可以表示原因的連詞for引導原因狀語從句?？碱}3 A man cannot smile like a child, _ a child smiles with his eyes, while a man smiles with his lips alone. (2006湖南A. soB. butC. andD. for答案D解析下劃線處之后的句子補充說明“a man cannot smile like a chi

7、ld”的原因,應選用for表原因一、引導原因狀語從句的從屬連詞主要的有because, as, since,for,seeing (that, now (that, considering (that,in that等:The woolly shrank because it was washed badly. 毛衣因洗得不得法而縮水。I cant get to sleep because of the noise outside. 由于外面聲音嘈雜我睡不著。Since As weve no money, we cant buy it. 由于我們沒錢,我們無法購買它。Seeing that i

8、ts raining, wed better stay indo ors. 既然外邊在下雨,我們最好待在室內。Now that you are here, youd better stay. 你既然來了,最好還是留下吧(既來之,則安之?！咀ⅰ砍陨咸岬降拇蠹冶容^熟悉的引導原因狀語從句的從屬連詞外,when有時也可引導原因狀語從句(when表示“既然”I wont tell you when you wont listen. 既然你不想聽,我就不告訴你了。二、關于notbecause結構該結構中的否定詞有時否定主句,有時否定從句,一般要根據句子的意思作出正確或合乎邏輯的理解。若not否定主句,最

9、好在because之前用逗號,否則會引起歧義,如下句在沒有特定上下文時就有兩種解釋:I didnt go because I was afraid. 我沒有去是因為怕。/ 我不是因為怕才去。不過若because之前有just修飾,一般認為not 是否定從句的:You shouldnt get angry just because some people speak ill of you. 你不要因為有人說你壞話而生氣。三、because習慣上不與so連用漢語習慣上說“因為所以”,但英語習慣上卻不能將so與because 連用:因為下雨,所以我們呆在家里。正:Because it was rai

10、ning, we stayed at home. / It was raining, so we stayed at home. 誤:Because it was raining, so we stayed at home. 四、because 從句與because of短語的轉換Because引導的原因狀語從句有時可與because of 短語轉換,because of后加的原因可以為好或壞但最正規(guī)的還是because He cant come because he is ill. / He cant come because of his illness. 他因病不能來。I said no

11、thing about it because his wife was there. / I said nothing about it because of his wifes being there. 因為他妻子在那兒,我對此事只字未提。比較: because, since, as和for 1because語勢最強,表示不知道的原因用because,即說話人認為聽話人不知道。因此because從句是全句最重要的部分,通常被放置于主語之后。當原因是顯而易見的或已為人們所知,就用as或since。I didn't go, because I was afraid. Since /As

12、the weather is so bad, we have to delay our journey. 2for雖然表示不知道的原因,但因語氣比because弱得多,是可說可不說的話,只能位于主語之后,這時,for是并列連詞,如果不是因果關系,而是對前面主語內容加以解釋或推斷時,只能用for。He is absent today, because / for he is ill. He must be ill, for he is absent today.編輯本段用法原因狀語從句表原因,以下逐一介紹中考、高考中常見的原因狀語從句的引導詞: 1. because引導的原因狀語從句一般放于主句

13、之后,because表示直接原因,語氣最強,最適合回答why引導的疑問句。例如:I do it because I like it. 我做這件事是因為我喜歡。注意:“not . because”結構中的not 否定的是because引導的整個從句,例如:The country is not strong because it is large. 國強不在大。 2. since引導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 had better help me w

14、ith my mathematics. 既然今天你休息,你最好幫我補習數(shù)學。注意:seeing (that,now (that,considering (that,in that這幾個詞匯與since引導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 help him. 他既然曾經拒絕幫助我們,我們現(xiàn)在沒有理由要來幫助他。/ Now (that you are grown up, you should not rely on your parents.

15、既然你長大了,就不應該依靠你的父母了。/ 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. 因為有病,他覺得做不了那件事。 3. as 引導原因狀語從句時表示附帶說明的“雙方已知的原因”,語氣比since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

16、 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,因為我筋疲力盡了。 4. for引導的原因狀語從句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 引導的原因狀語從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。編輯本段考題解析考題1 _ youve got a chance, you might as well

17、 make full use of it. (1999 A. Now that B. After C. Although D. As soon as 答案 A解析 主句與從句之間存在因果關系,且“youve got a chance”表示一個顯而易見的原因,因此應選用表原因的now that?？碱}2 He found it increasingly difficult to read, _ his eyesight was beginning to fail. (2006北京 A. and B. for C. but D. or 答案 B 解析 “his eyesight was beginn

18、ing to fail”是“he found it increasingly difficult to read”的原因,因此本題應選用可以表示原因的連詞for引導原因狀語從句。考題3 A man cannot smile like a child, _ a child smiles with his eyes, while a man smiles with his lips alone. (2006湖南 A. so B. but C. and D. for 答案 D 解析 下劃線處之后的句子補充說明“a man cannot smile like a child”的原因,應選用for表原因。why不能引導狀語從句,可引導定語從句或賓語從句等。你是不是覺得why可引導原因狀語從句?下面我著重加以說明。狀語從句,顧名思義就是在句中起狀語作用的句子,這類從句一般放在句后,強調時放在句首。狀語從句通常用來修飾謂語動詞、其它動詞、定語、狀語或整個句子,一般可以分為:1時間狀語從句2.地點狀語從句;3.原因狀語從句;4.條件狀語從句;5.目的狀語從句;6.