专题十定语从句用一个句子作定语,此句子叫作定语从句
定语从句位于被它修饰的名词或代词之后
被定语从句修饰的词叫先行词,引导定语从句的词叫关系词
关系词可分为关系代词(who,whom,whose,which,that)和关系副词(when,where,why)关系词都充当从句的某个成分,它所替代的相应成分应省去
在定语从句中,当who,which,that作主语时,谓语的单复数应与先行词保持一致
定语从句分为限制性定语从句和非限制性定语从句
非限制性定语从句与先行词的关系不如限制性定语从句与先行词的关系紧密,没有它,主句的意思也清楚,因此用逗号隔开
关系词在非限制性定语从句中的用法与在限制性定语从句中的用法基本一样
八大关系词用法表who,whose,whom,that先行词是人时:从句中缺少主语用who;从句中缺少宾语用whom;从句中的主语缺少定语用whose;that可替换who和whom,作从句的主语或宾语
Thegirlwho/thatbecameanursetwoyearsagoismycousin
(who/that作定语从句的主语)Hawkingisthedisabledscientistwhom/thatwesawinBeijinglastyear
(whom/that作定语从句中saw的宾语)Theboywhosemotherisafamoussingerisalittleactorof7
(whose作定语从句的主语mother的定语
)whichthat先行词是物时:从句中缺少主语或宾语用which;从句中主语缺少定语用whose;that可替换which,作从句的主语或宾语
Theresearchwhich/thatwascarriedonforyearswasstopped
(which/that作定语从句的主语)Thetopicwhich/th