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英语六级语法复习:比较状语从句

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  下面学习啦考试网为大家带来六级语法考点:比较状语从句,希望可以帮助大家更好地备考英语六级考试。
 

  比较状语从句:

  than,as…as…,not so as…,(not) the same as,the+比较级;

  eg:Light travels fast than sound.

  the+比较级:

  eg:The sooner,the better.

  (1)当……的时候:while,when,as ;

  when:强调一件事情正在发生的时候,另外一件事情突然发生;

  eg:When I was watching TV, my mother came back.

  while:强调两个动作同时进行,一边……一边……;

  eg:My father is cooking while my mother is reading newspaper.

  as:"随时间推移"

  eg:As time went by, the days became longer and longer.

  (2)一……就……:as soon as,主将从现;用directly,immediately, instantly连接两个句子;一些名词如the minute,the moment,the instant也可表示;no sooner… than,hardly… when后面的句子需要倒装;

  eg:I will write to you the moment/minute I arrived in Paris.

  (3)特殊单词:by the time that,every/each time(使用时后面不要再加when)

  (4)till&until:

  ① 肯定形式表示的意思是"做某事直至某时",动词必须是延续性的;

  否定形式表达的意思是"直至某时才做某事",一般用until,动词为延续性或非延续性都可以;

  eg: I slept until midnight.

  Wait till I call you.

  She didn't arrive until 6 o'clock.

  ② Until可用于句首,而till通常不用于句首,通常用于句中;

  eg: Until you told me, I had heard nothing of what happened.

  eg:As you sleep you pass through a sequence of sleep states—light sleep, deep sleep and REM (rapid eye movement) sleep—that repeats approximately every 90 minutes.

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