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1、介词+关系代词引导的定语从句【知识点1】直接位于介词之后的关系代词只能是which或whom，构成介词+which（指物）；介词+whom（指人）两种结构。【例】Themantowhomyoutalkjustnowisafamousrunner.【例】Theserviceaboutwhichthestudentscomplainalotshouldbeimproved.【例】HeisalibraryassistantfromwhomIborrowedsomebooks.【例】Itisafamousschoolfromwhichhegraduated3yearsago.【例】Th
2、echaironwhichheissittingnowismadeofwood.【知识点2】直接位于介词后面的关系代词不能省略，但如果将介词移于句子末尾而不位于关系代词之前时，可省。【例】Theman(who/that/whom)youtalktojustnowisafamousrunner.【例】Theservice(which/that)thestudentscomplainaboutalotshouldbeimproved.【例】Heisalibraryassistant(whom/that/who)Iborrowedsomebooksfrom.【例】Itisafamou
3、sschool(which/that)hegraduatedfrom3yearsago.【例】Thechair(which/that)heissittingonnowismadeofwood.【知识点3】关系副词when,where,why可以相应地转化为：介词+which结构。【例】ThisisthehousewhereIlivedtwoyearsago.=ThisisthehouseinwhichIlivedtwoyearsago.【例】Doyourememberthedaywhenyoujoinedourclub?=Doyourememberthedayonwhichyo
4、ujoinedourclub?【例】Idon’tknowthereasonwhyhesaidso.=Idon’tknowthereasonforwhichhesaidso.【知识点4】有一些动词短语中的介词是固定搭配，不可以拆开，一般还是放在动语之后，不提前：【例】Heisthestudent(who/whom/that)theteachersarelookingfor.【例】Thenumberofthechildren(who/whom/that)shetakescareofis30.【知识点5】注意复杂介词短语+which或whom引导的定语从句，是高考考查热点。【例】Th
5、eyfinallyclimbedupthemountain,ontopofwhichmanystrangebirdswereseen.【例】Lookatthephoto.ThisisMr.Green,infrontofwhomsitthreestudents.【知识点6】不定代词+of+which/whom引导的定语从句可化为of+which/whom+不定代词结构；这也是高考常考点。其中用到的不定代词有some,any,none,both,all,many,afew,few,alittle,little,either,neither,one,等等。【例】Thereare40s
6、tudentsinourclass,mostofwhom（=ofwhommost）likeEnglish.第4页共4页【例】ThesearebookswrittenbyMarkTwain,oneofwhich（=ofwhichone）wasreadtomebymyfather【例】Shehastwosons,neitherofwhom（=ofwhomneither）isateacher.【例】Shehasmanybooks,noneofwhich(=ofwhichnone)isinteresting.【知识点7】关系代词whose+名词引导的定语从句可转化为the+名词+of+
7、which/whom或of+which/whom+the+名词结构；of表所属关系。【例】Iliveinaroomwhosewindowsareallbroken.=Iliveinaroomofwhichthewindowsareallbroken.=Iliveinaroomthewindowsofwhichareallbroken.【例】Thisismyteacherwhosehandwritingisexcellent.=Thisismyteacherthehandwritingofwh
