定语从句总结一定义：定语从句【AttributiveClauses】，一个简单句跟在一名词或代词后(先行词)，并且对该先行词起着修饰限定的作用，让句子意思更加完整，就叫做定语从句。被修饰的词叫先行词。二构成：主句含先行词+关系词+定语从句定语从句通常只能放在被修饰的词(即先行词)之后。定语从句由关系词(关系代词、关系副词)引导，关系代词、关系副词位于定语从句句首。三关键成分：先行词（人、物）关系词（代、副）先行词在从句中充当的成分四定语从句分类：2类【1关系代词引导的定语从句+2副词引导的定语从句】【1关系代词引导的定语从句】关系代词所代替的先行词是人或物的名词或代词，并在句中充当主语、宾语、定语等成分。关系代词在定语从句中作主语时，从句谓语动词的人称和数要和先行词保持一致。关系代词分类先行词关系代词在从句充当成分人who主语whom宾语人或物whose定语，“⋯的”物which主语，宾语人或物That主语，宾语【例句演示】1先行词是人Theteacherwhoisstandingthereismybrother.Ishethemanwho/thatwantstoseeyou?Heisthemanwhom/thatIsawyesterday.WhereisthegirlwhoiscalledLucy?2先行词是物ThenextplacewewillvisitistheGreatWall.Theinsectwhichscaredherwasdangerous.Thepicturethatisonthewallbelongstomybrother.Thesongwhichheissingingsoundsbeautiful.3先行词是人或物Thelittlegirlwhosemotherisanursecries.Thebreadwhosepriceisveryhightastesgreat.Theyrushedtohelpthepoormanwhosecarhadbrokendown.Pleasepassmethetextbookwhose(ofwhich)coverisgreen.【2副词引导的定语从句】关系副词可代替的先行词是时间、地点或理由的名词，在从句中作状语。关系副词分类先行词关系副词在从句充当的成分时间when时间状语地点where地点状语原因why原因状语【例句演示】Thereareoccasionswhen(onwhich)onemustlie.Tianjinistheplacewhere(inwhich)Iwasborn.Isthisthereasonwhy(forwhich)herefusedouroffer?Iwanttogototherestaurantwherewehaddinnerlasttime.ThisisthereasonwhyIlikethisinterestingbook.I(will)neverforgetthosedayswhenIwasinLondon.ImissthecitywhereIgrowup.Thereasonwhyhedidn’tcomeisthathewasill.五易错点:只用that的情况：先行词为不定代词、被theonly(唯一),thevery（恰恰，正好）修饰、是形容词最高级或先行词的前面有形容词最高级修饰时、先行词是all,any,few,little,much或被此类词修饰时HeistheonlyonethatIlove.Ihavelittlewaterthatcanfillthebottle.
