第七節(jié) 狀語從句（條件 讓步） 高三英語一輪復(fù)習(xí)

第七節(jié)

狀語從句知識精講一.讓步狀語從句引導(dǎo)讓步狀語從句的連詞由：though,although,while,evenif,eventhough,however,nomatterhow,nomatterwhat,nomatterwho等。1.though,although引導(dǎo)讓步狀語從句時都不能和but連用，但可以同yet(still)連用。Eg:Although/Thoughheisacriminal,hemadeagreatcontributiontothesociety.Although/ThoughTomisacat,heyetdoesn’twanttoeatJerry.知識精講2.while引導(dǎo)讓步狀語從句時意為“盡管，雖然”，多用于句首。3.as,though引導(dǎo)讓步狀語從句時，從句要采用倒裝語序。Eg：Childas/thoughhewas,heknewwhatwastherightthingtodo.4.whether...ornot引導(dǎo)意為“無論（是否）”。Eg:Whetheryoubelieveitornot,itistrue.知識精講5.however+adj/adv=nomatterhow+adj/adv...意為“無論多么...”。Eg：Nomatterhowdifficulttheproblemis,Iwilltrymybesttosolveit.Eg：Howeverdifficulttheproblemis,Iwilltrymybesttosolveit.知識精講6.wh-ever等一系列連詞既可引導(dǎo)讓步狀語從句相當(dāng)于nomatterwh-,也可引導(dǎo)名詞性從句Eg：Nomatterwhathappened,hewouldnot

mind.=Whateverhappened,hewouldnotmind.知識精講二.條件狀語從句條件狀語從句通常分為兩大類：真實(shí)條件句和虛擬條件句。引導(dǎo)條件狀語從句的連詞由：if,unless/if...not,aslongas/solongas,asfaras/sofaras,provided/providing(that),onconditionthat等。1.條件狀語從句中的主將從現(xiàn)原則。條件狀語從句中如果主句是將來時，條件狀語從句用一般現(xiàn)在時。如果條件狀語從句中出現(xiàn)過去時，則為虛擬條件句，那么主句要用相應(yīng)的虛擬語氣形式。Eg：IfIhaveextratime,Iwillmakefulluseofittoreadmorebooks.知識精講2.unless和if...not在條件狀語從句中的用法unless相當(dāng)于if...not，在虛擬條件句中可用if...not,但不能用unless.Eg:Ifshewerenottoosilly,shewouldunderstandit.知識精講