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中考狀語從句知識(shí)點(diǎn):時(shí)間狀語從句

2010-06-01 14:49:56  來源:網(wǎng)絡(luò)資源

  要點(diǎn)——時(shí)間狀語從句,由以下連詞引導(dǎo):


  when while as after before as soon as since till /until by the time 在時(shí)間狀語從句中,要注意時(shí)態(tài)一致。一般情況下主句是將來時(shí)的時(shí)候,從句要用一般現(xiàn)在時(shí)。


  1.when當(dāng)……的時(shí)候


  Mozart started writing music when he was four years old.


  (當(dāng))莫扎特的時(shí)候,開始寫音樂作品。


  2.while當(dāng)……時(shí)


  He visited a lot of places while he was traveling.


  他在旅途中參觀了許多地方。


  3.as在。。。的同時(shí);一邊……一邊……


  He smiled as he stood up.


  他一邊站起來一邊笑著。


  4.after在……之后


  He left the classroom after he had finished his homework the other day.


  前幾天做完功課之后回的家。


  5.before 在……之前


  Mr. Brown had worked in a bank for a year before he came here.


  布朗先生來這之前已經(jīng)在一家銀行里工作一年了。


  6.as soon as 一……就……


  We began to work as soon as we got there.


  我們一到那就開始工作。


  I will write to you as soon as I get home.


  我一到家就給你寫信。


  7.since 自。。。以來 到現(xiàn)在


  表示自過去的一個(gè)起點(diǎn)時(shí)間到目前(說話時(shí)間)為止的一段持續(xù)時(shí)間。主句一般用現(xiàn)在完成時(shí),從句用一般過去時(shí)。


  Mr GREen has taught in that school since he came to China three years ago.


  自格林先生來中國以來,他就在這所學(xué)校教書。


  (還可以用作介詞,本句從句還可以用短語:since three years ago(自三年前以來)表示。)


  8 till /until


  都可以作連詞,連接時(shí)間狀語,也可以作介詞,與其它詞構(gòu)成介詞短語,在句中作狀語。


  They walked till /until it was dark.


  他們一直走到天黑。


  Xiao Ming didn’t leave home till / until his father came back.


  小明直到他爸爸回來才離開家。


  9. by the time 到。。。為止 (所在句子的主句應(yīng)用完成時(shí))


  By the time he gets there , his father has already gone.


  他到家的時(shí)候,他爸爸已經(jīng)走了。


  By the time I got to school, the class had already began.


  我到校時(shí),已經(jīng)開始上課了。


  難點(diǎn)——as when while的辨析


  as when while都表示主、從句動(dòng)作同時(shí)發(fā)生,三者差異如下:


  表示“一邊。。。一邊"的意思


  as 強(qiáng)調(diào)兩個(gè)動(dòng)作同時(shí)進(jìn)行,并表示對(duì)比時(shí)


  用于發(fā)生時(shí)間較段時(shí)


  when 1、還可以表示從句動(dòng)詞的動(dòng)作在主幾句動(dòng)詞的動(dòng)作"之前 "或"之后"發(fā)生。


  2、when=and then; at that moment (正在那個(gè)時(shí)候)


  while


  1、用于時(shí)間較長(zhǎng)時(shí)


  2、 強(qiáng)調(diào)兩個(gè)動(dòng)作同時(shí)進(jìn)行,并表示對(duì)比時(shí)


  有時(shí)這三個(gè)連詞可以互換,有時(shí)不可以。


  It was raining hard when (as) I got there.


  我到那里時(shí),正在下大雨。 ( 動(dòng)作同時(shí)發(fā)生,when可換為as, 但不能換為while,因?yàn)間et是點(diǎn)動(dòng)詞.)


  When I had read the article, he called me.


  我看完這篇文章之后,她給我打了電話。( 從句動(dòng)作發(fā)生在主句之前,注意時(shí)態(tài)表達(dá),只能用when )


  When I got to the cinema, the film had begun.


  (當(dāng))我到了電影院時(shí),電影已經(jīng)開演了。(從句的動(dòng)作發(fā)生在主句之后,只能用when,并要注意時(shí)態(tài))


  He was about to leave, when the telephone rang.


  他正要離開,忽然電話響了。( 此時(shí)不能放在句首。主句動(dòng)詞一般表達(dá) “正在” “即將”.


  while, as不能代替 ) 考點(diǎn)


  She thought I was talking about her daughter, while, in fact, I was talking about my daughter.


  他以為我在談她女兒,然而,實(shí)際上在談?wù)撐遗畠骸?表轉(zhuǎn)折,對(duì)比,when, as都不能代替它) 考點(diǎn)


  lWhile the alien was buying a souvenir, the girl called the police.


  外星人買紀(jì)念品時(shí),那女孩給警察打了電話。(表示主句,從句的動(dòng)作同時(shí)發(fā)生,while后引導(dǎo)的狀語從句的動(dòng)詞必須是延續(xù)動(dòng)詞不能是點(diǎn)動(dòng)詞,因?yàn)樗硎据^長(zhǎng)時(shí)間)考點(diǎn)


  Mother was worried BECause little Alice was ill, especially as (when/ while) father was away.


  媽媽擔(dān)心,因?yàn)樾埯惤z病了,特別是他父親不在家的時(shí)候。(此時(shí)as ,when, while可通用)


  知識(shí)擴(kuò)展


  1. It is since從。。。以來多長(zhǎng)時(shí)間了(因?yàn)閟ince +從句或名詞,表示一段時(shí)間)


  It is five years since we met last time.從我們上次見面已經(jīng)五年了。


  2. It is +before…(。。。才)


  It was a long time before I went to sleep again.


  過了很長(zhǎng)時(shí)間我才睡著。


  It was an hour before(=until) the police arrived.


  過了一個(gè)小時(shí),警察才來。

 

 

更多中考狀語從句的文章:

中考狀語從句知識(shí)點(diǎn):條件狀語從句

中考狀語從句知識(shí)點(diǎn):原因狀語從句

中考狀語從句知識(shí)點(diǎn):地點(diǎn)狀語從句

中考狀語從句知識(shí)點(diǎn):目的 結(jié)果狀語從句

中考狀語從句知識(shí)點(diǎn):讓步狀語從句

中考狀語從句知識(shí)點(diǎn):比較狀語從句

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