分类•从句是相对于主句而言的,即它是从属于某一个主句,而不能单独作一个句子。在英语中,主要有三大从句,即名词性从句(包括主语从句,宾语从句,表语从句,同位语从句)、形容词性从句(即定语从句)、副词性从句(即状语从句,包括时间、条件、结果、目的、原因、让步、地点、方式等)。1主语从句Whetherit'srightornotremainstobeseen.2宾语从句Iwonderwhetherit'srightornot.3同位语从句Thisisaquestionwhetherit'srightornot.4表语从句Thequestioniswhetherit'srightornot.名词性从句形容词性从句(定语从句)1限定性定语从句SheisthestudentwhocanspeakEnglishwell.2非限定性定语从句Sheisthestudent,whocanspeakEnglishwell.状语从句•1时间状语从句•Thefactwillcomeoutwhenhecomeshere.•2地点状语从句•Youcangowhereveryoulike.•3原因状语从句•Paymoreattentiontoyourlessonsbecauseyouareastudent.•4方式状语从句•Hewalksasifhewereaking.•5目的状语从句•ShewenttoJapansothatshecouldlearnJapanesewell.•6结果状语从句•ShewenttoJapansothatshelearnedJapanesewell.•7条件状语从句•Iwillunderstanditifhetellsme.•8让步状语从句•Heknowsalotthoughheislittle.主语从句•主语从句(subjectclauses)在复合句中起主语作用的从句叫主语从句。引导主语从句的词有从属连词、、关系代词、连接副词等。引导主语从句的关联词有从属连词that、whether,关系代词:who,what,which,whom,whose,whatever,whoever,whomever,whichever;关系副词:when,where,how,why,however,whenever,wherever等。表语从句表语从句用作表语的从句叫作表语从句,它位于主句中的连系动词之后。引导表语从句的词有从属连词that、whether、asthough(if);关系代词who,what,which,whom,whose,whatever,whoever,whomever,whichever等;关系副词when,where,why,how,however,whenever,wherever等。可以接表语从句的连系动词由be,look,remain,seem等。That引导表语从句时,在口语中间或可以省略。宾语从句•宾语从句(objectclauses)用作宾语的从句叫做宾语从句。宾语从句的位置与陈述句基本结构中的宾语相同。宾语从句可作谓语动词的宾语,也可以作介词和非谓语动词(动词不定式、动名词、分词)和某些形容词的宾语。宾语从句可以由从属连词thatwhether、if,关系代词what,who,whose,which和关系副词when、where、how、why等引导。同位语从句•同位语从句用作同位语的从句叫同位语从句。它一般跟在抽象名词fact,idea,news,hope,belief,thought,truth,doubt,suggestion,warning,instruction,reason,information,question等之后,对这些名词进行说明或解释。引导同位语从句的词除连词that,whether外,还有关系代词what,which,who,以及关系副词how,when,where,why等。