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一．定语从句定义及相关术语
1定语从句：修饰某一名词或代词的从句叫定语从句。定语从句一般紧跟在它所修饰的先行词之后。2先行词：被定语从句修饰的词叫先行词。3关系词：引导定语从句的词叫关系词。
关系词有关系代词和关系副词。关系代词有thatwhichwhowhomwhoseas等；关系副词有whe
wherewhy等。
关系词通常有下列三个作用：A引导定语从句B代替先行词C在定语从句中担当一个成分
二．关系代词表格
关系词who
whom
先行词人
人
从句成分
例句
主语，宾语Doyouk
owthema
whoistalki
gwithyourmother
宾语
Theboywhomsheloveddiedi
thewarMrSmithistheperso
withwhomIamworki
g
关whose系代词
that
which
as
备注
whe
关系副where词
why
人，物人，物物人，物
时间地点原因
定语
IlikethosebookswhosetopicsareabouthistoryTheboywhosefatherworksabroadismyclassmate
主语，宾语Apla
eisamachi
ethatca
fly
表语
SheisthepopstarthatIwa
ttoseeverymuch
Sheis
ottheperso
thatsheusedtobe
ThebookwhichIgaveyouwasworth10主语，宾语Thepicturewhichwasabouttheaccide
twas
terrible
主语，宾语Heissuchaperso
asisrespectedbyallofusThisisthesamepe
asIlostyesterday
Whowhomwhich和that在从句中做宾语时，常可以省略，但介词提前时后面关系代词不能省略，也不可以用that和who
状语
Iwill
everforgetthedayswhe
wespe
tourholidaystogether
状语
Ik
owaplacewhereweca
haveapic
ic
状语
Thisisthereaso
whyhewasfired
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例如：（注意关系代词在定语从句中所充当的成分）①Doyouk
owtheprofessorwhothatwillgiveusaspeech
extweek（作主语）②Ireadareportabouthis
ew
ovelthatwhichwillsoo
bepublished（作主语）③Thepla
thatwhichtheyarguedaboutwassettledatlast（作宾语）④Thisisthe
ewsecretarywhowhomthatIwouldliketoi
troducetoyou（作宾语）⑤Thesoldierwhoselegswerebadlywou
dedwasoperatedo
withoutdelay（作定语）
三．6个关系代词的用法
1）关系代词that和which的用法whichthat在代替物时，一般可以通用。Hisfatherworksi
afactorythatwhichmakesTVsetsThecoatwhichthatIputo
thedeskisblack▲但在有些情况下，只用that1先行词是最高级形容词或它的前面有最高级形容词修饰时。①Thisisthebestwaythathasbee
usedagai
stpollutio
②E
glishisthemostdifficultsubjectthatyouwilllear
duri
gtheseyears2先行词是序数词，或它前面有一个序数词时。①ThisisthelastplacethatIwa
ttovisit②ItisthefirstAmerica
movieofthiski
dthatI’veeversee
r