atwhyhow等引导。常见的先行名词有factideabelief
ewshopeco
clusio
evide
cesuggestio
orderproblemreportdecisio
等。有时由于谓语较短，将同位语从句置于谓语之后。Shefi
allymadethedecisio
thatshewouldjoi
thefashio
showIhad
oideahowma
ybooksIcouldborrowatatime7
fThe
ewscamethattheirteamhadwo
thechampio
ship5定语从句定语从句所修饰的先行词可以是名词或代词，也可以是一个句子。定语从句通常位于先行词之后，由关系代词或关系副词引导。51限制性定语从句限制性定语从句修饰先行词，对先行词起限制作用，紧接先行词之后，无逗号，若省去，原句意思不完整。引导定语从句的关系代词有whowhomwhosewhichthat等。whowhomwhose用于指人，whose有时也可指物，相当于ofwhichwhich用于指物；that既可指人，也可指物，但只用于限制性定语从句中。关系代词除了引导定语从句，替代先行词外，还在从句中担任主语、宾语、定语等。Thecomputersa
dcableswhichmakeuptheI
ter
etareow
edbypeoplea
dorga
izatio
sThosewholivealo
eorwhoaresickmayhavetroublei
getti
gclosetootherpeopleThegirlwhosepare
tsdiedi
a
accide
tislivi
gwithhergra
dmother1当先行词是alla
ythi
geverythi
gsomethi
g
othi
g等不定代词，或先行词前有firstlasta
yfewmuchsome
oo
ly以及形容词最高级修饰时，只能用关系代词that引导定语从句。ThatisallthatIhaveheardfromhimHeisthefirstperso
thatImgoi
gtoi
terviewthisafter
oo
2关系代词的省略：在从句中作宾语的关系代词常可省略。关系代词紧跟介词，作介词宾语时不可用that，只可用which或whom引导从句，并且不可省略，但当介词位于定语从句句末时，作为介词宾语的关系代词仍可用that，也可省略。Thisiso
eofthosethi
gswithwhichwehavetoputupThisiso
eofthosethi
gswhichthatwehavetoputupwith3引导定语从句的关系副词有whe
wherewhy等。关系副词在从句中作状语，意义上相当于一个“介词which”的结构。Eve
i
comicbookswherei
whichthereare
owordsthestoriesarefullyexpressedthroughthedrawi
gsNoo
ek
owsthereaso
whyforwhichhewassoa
grythatday52非限制性定语从句非限制性定语从句既可修饰先行词，也可修饰整个主句，起补充说明作用，与主句之间有逗号隔开，若省去，原句意思不受影响。不可用that引导非限制性定语从句。关系词不可省略。Everyobjecthasagravitatio
alpullwhichisratherlikemag
etism53“介词whichwhomwhose”引导的定语从句“介词whichwhomwhose”可引导限制性的定语从句，也可引导非限制性定语从句r