状语从句
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第一篇状语从句:状语从句有哪些
1、时间状语从句：通常由从属连词when,before,af－\x0dter,assoonas,until(till),since等引导.\x0d如：Thewomanbegantocryaf－\x0dtershereadtheletter.Iwaitedtill(until)shecameback.\x0dTheboydidn’tstoptalkingun－\x0dtiltheteachercamein.I’lltellhimthenewsassoonasIseehim.Wehaven’theardfromhersinceshemovedaway.\x0d在带有时间状语从句的主从复合句中,主语是一般将来时,从句要用一般现在时.\x0d如：Hewillcometoseeyouwhenhehastimenextweek.Iwillnotleaveuntilhecomeshere.AssoonasIseehim,I’llgivethe\x0dlettertohim.\x0d2、地点状语从句：由where等引导.\x0d如：Jackputthemeatwherethecatwouldnotreachit.\x0dWherethereisawill,thereisaway.（有志者事竟成）\x0dI’mstandingwhereIcansee\x0dthegame.3、原因状语从句：由because,as等引导.\x0d如：LiMingdidn’tcometo\x0dschoolbecausehewasill.Youngpeoplelovethistimeofyear,becauseitisgoodforsport.Asit’sraining,you’dbettertakeataxi.\x0dAstheweatherwasfine,wewentoutforawalk.\x0d4、条件状语从句：由if引导.\x0d如：IfI’mfree,I’llgowithyou\x0dtothecinema.Ifyoueatoldfood,youmaybeill.Wewon’tgototheGreatWallifitrainsnextweek.\x0d由if引导的条件状语从句中,如果主语的谓语动词是将来时,从句的谓语动词时就用一般现在时,这一点与时间状语从句相同.\x0d5、比较（或方式）状语从句：由than,as…as引导.\x0d如：JimisolderthanLucy(is).HiscakeisbiggerthanLily’s.Icanreadaswellashecan.\x0dXiaoHongisastallasherbrother.6、结果状语从句：由so…that,sothat等引导.\x0d如：Hebecamesoangrythathecould’tspeek.\x0dSheworkedsoquietlythatnooneknewshewasthere.\x0d7、让步状语从句：由although,nomatter,evenif,however等连词引导.
第二篇状语从句:引导原因状语从句用法123
why不能引导状语从句,可引导定语从句或宾语从句等.你是不是觉得why可引导原因状语从句?下面我着重加以说明.状语从句,顾名思义就是在句中起状语作用的句子,这类从句一般放在句后,强调时放在句首.状语从句通常用来修饰谓语动词、其它动词、定语、状语或整个句子,一般可以分为：1时间状语从句2.地点状语从句；3.原因状语从句；4.条件状语从句；5.目的状语从句；6.让步状语从句；7.比较状语从句；8.程度状语从句；9.方式状语从句；10.结果状语从句.至于原因状语从句,它有下面引导词：because,as,since,for,seeing (that),now (that),considering (that),in that都表示原因.because语势最强,回答why提出的问题,用来说明人所不知的原因.当能够很明显的看出原因或人们已知原因,就用as或since.The woolly shrank because it was washed badly.毛衣因洗得不得法而缩水.I can’t get to sleep because of the noise outside.由于外面声音嘈杂我睡不着.Since /As we’ve no money,we can’t buy it.由于我们没钱,我们无法购买它.Seeing that it’s raining,we’d better stay indoors.既然外边在下雨,我们最好待在室内.Now that you are here,you’d better stay.你既然来了,最好还是留下吧(既来之,则安之).除以上提到的比较熟悉的引导原因状语从句的从属连词外,when有时也可引导原因状语从句(when表示“既然”)I won’t tell you when you won’t listen.既然你不想听,我就不告诉你了.可见why并不能引导原因状语从句.
第三篇状语从句:状语从句省略句If not well managed ,irrigation can be harmful.把省略的部分还原回去
If the irrigation is not well managed,irrigation will be harmful.因为条件从句中的主语与主句中的主语一致,可以把从句的主语和be动词省略.
