定语从句用法详解

1/3定语从句用法详解在复合句中，修饰名词或代词的从句叫定语从句，被修饰的名词或代词叫先行词，引导定语从句的有关系代词WHO,WHOM,WHOSE,WHICH,THAT等和关系副词WHERE,WHEN,WHY等，关系代词和关系副词在定语从句中担任句子成份。1由WHO引导的定语从句中，WHO用作主语，如THISISTHEBOYWHOOFTENHELPSME2由WHOM引导的定语从句中，WHOM用作宾语，如THEMANWHOMYOUAREWAITINGFORHASGONEHOME3由WHOSE引导的定语从句中，WHOSE用作定语，如DOYOUKNOWTHEGIRLWHOSESKIRTISWHITE4由WHICH引导的定语从句中，WHICH用作主语或谓语动词的宾语或介词的宾语，如THEROOMINWHICHTHEREISAMACHINEISAWORKSHOPTHERIVERWHICHISINFRONTOFMYHOUSEISVERYCLEANTHISISTHEPENWHICHYOUWANT注意2/31WHOM,WHICH用作介词宾语时，介词可放在WHOM、WHICH之前，也可放在从句原来的位置上；但在含有介词的动词固定词组中，介词只能放在原来的位置上。如HEISTHEVERYPERSONWHOMWEMUSTTAKEGOODCAREOF2引导非限制性定语从句时，必须用关系代词WHICH，不用THAT,如IHAVELOSTMYBAG,WHICHILIKEVERYMUCH3关系代词在句中作主语时，从句的谓语动词的人称和数必须和先行词保持一致。5由THAT引导的定语从句中，THAT可以指人或物，在从句中作主语或谓语动词的宾语，但不能放在介词后面作介词宾语，如THEBOOKTHATIBOUGHTYESTERDAYWASWRITTENBYLUXUN注意在下面几种情况下必须用THAT引导定语从句。1先行词是不定代词ALL,FEW,LITTLE,MUCH,SOMETHING,NOTHING,ANYTHING等，如ALLTHATWEHAVETODOISTOPRACTISEENGLISH2先行词被序数词或形容词最高级所修饰，如THEFIRSTLETTERTHATIGOTFROMHIMWILLBEKEPT3先行词被ALL,ANY,EVERY,EACH,FEW,LITTLE,NO,3/3SOME等修饰，如IVEEATENUPALLTHEFOODTHATYOUGAVEME4先行词被THEONLY,THEVERY,THESAME,THELAST修饰时如HEISTHEONLYPERSONTHATIWANTTOTALKWITH5先行词既有人又有物时，如THEYTALKEDABOUTPERSONSANDTHINGSTHATTHEYMET6当句中已有WHO时，为避免重复，如WHOISTHEMANTHATISGIVINGUSTHECLASS6由WHEN,WHERE,WHY引导的定语从句，如IDONTKNOWTHEREASONWHYHEWASLATETHISISTHEPLACEWHEREWEHAVELIVEDFOR5YEARSILLNEVERFORGETTHEDAYWHENIMETMRLIFORTHEFIRSTTIME注意先行词是表示地点时，如果从句的谓语动词是及物的，就用THATWHICH，如果从句的