2012年12月大学英语四级语法:比较状语从句- b; H) i: N `- Y
比较状语从句:
1 H8 R" p. ^+ `+ _8 n than, as…as…,not so as…,(not) the same as, the+比较级; + p+ [' f$ E2 m! R
eg:Light travels fast than sound.
- ]5 t) F7 V! x* `% Q the+比较级: $ x5 `% E7 p3 j. r) r( T
eg:The sooner,the better. " c) S P- v. _9 l7 J, A: Y' @
eg:Girls are thus seen as less valuable than boys and art kept at home to do housework while their brothers are sent to school - the prophecy(预言) becomes self- fulfilling, trapping women in a vicious circle (恶性循环) of neglect. $ J( r/ s7 F4 E9 T' l. N
(1)当……的时候:while, when, as ; 4 t$ B5 m( f& o% x* Q
when:强调一件事情正在发生的时候,另外一件事情突然发生;
6 f( L) v* F( f9 A8 I eg:When I was watching TV, my mother came back. / o" p A3 I; {+ ~( }
while:强调两个动作同时进行,一边……一边……;
7 Q5 L/ R5 E7 g' P( G% h eg:My father is cooking while my mother is reading newspaper. 中华考试网2 J+ @: m- a% m( [" A& j, {" g
as:"随时间推移" 6 m0 X8 ^ p$ H7 D, f: c2 R c& C8 o5 U
eg:As time went by, the days became longer and longer. ( K% G8 m) H+ Y0 ?
(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;
& E) f4 f5 ~0 _) \4 F O2 w eg:I will write to you the moment/minute I arrived in Paris.
: g v1 W$ M3 w (3)特殊单词:by the time that, every/each time(使用时后面不要再加when)
, M& {. S$ p& s$ Y; }. B7 { (4)till&until: / W# x8 I9 C3 X! g% J; b
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;
% n) \& n) J' G4 Y$ A8 n5 b 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;
3 y; M$ X1 N5 C7 v eg: I slept until midnight. 0 L7 E5 a W7 n3 N0 ?" j" q# b
Wait till I call you. . c1 k& G% o" Q% x
She didn’t arrive until 6 o’clock.
2 {: r- J2 K! U* Z ② Until可用于句首,而till通常不用于句首,通常用于句中;
& ^. }$ ^. R: t0 J eg: Until you told me, I had heard nothing of what happened. / I( E6 |+ s% Q0 Q1 ^% ~
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. |