學(xué)習(xí)語法首先要學(xué)習(xí)句子,因?yàn)榫渥邮侨祟愓Z言的核心,通過對句子的分析理解,可以更好的掌握語法。下面是小編整理的考研英語四級重點(diǎn)語法知識之比較狀語從句,希望對你的語法學(xué)習(xí)有所幫助!
than,as…as…,not so as…,(not) the same as,the+比較級;
eg:Light travels fast than sound.
the+比較級:
eg:The sooner,the better.
(1)當(dāng)……的時候:while,when,as ;
when:強(qiáng)調(diào)一件事情正在發(fā)生的時候,另外一件事情突然發(fā)生;
eg:When I was watching TV, my mother came back.
while:強(qiáng)調(diào)兩個動作同時進(jìn)行,一邊……一邊……;
eg:My father is cooking while my mother is reading newspaper.
as:"隨時間推移"
eg:As time went by, the days became longer and longer.
(2)一……就……:as soon as,主將從現(xiàn);用directly,immediately, instantly連接兩個句子;一些名詞如the minute,the moment,the instant也可表示;no sooner… than,hardly… when后面的句子需要倒裝;
eg:I will write to you the moment/minute I arrived in Paris.
(3)特殊單詞:by the time that,every/each time(使用時后面不要再加when)
(4)till&until:
?、?肯定形式表示的意思是"做某事直至某時",動詞必須是延續(xù)性的;
否定形式表達(dá)的意思是"直至某時才做某事",一般用until,動詞為延續(xù)性或非延續(xù)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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