1、that与which的区别。1）用that而不用which的情况：①先行词为不定代词all,anything,nothing,…；②先行词有最高级修饰，有序数词修饰；③先行词有only,very,any等词修饰；④先行词既有人又有物时。e.g.Thereisnothingthatcanpreventhimfromdoingit.没有什么能阻止他不干那件事。ThefirstplacethattheyvisitedinGuilinwasElephantTrunkHill.在桂林他们所参观的第一个地方是象鼻山。ThisisthebestfilmthatIhaveeverseen.这部电影是我看过的最好的一部。MrSmithistheonlyforeignerthatheknows.史密斯先生是他认识的唯一的外国人。2）用which而不用that的情况：①引导非限制性定语从句；②代表整个主句的意思；③介词+关系代词。e.g.Hehadfailedinthemathsexam,whichmadehisfatherveryangry.他数学考试没有及格，这使他的父亲很生气。Thisistheroominwhichmyfatherlivedlastyear.这是父亲去年居住过的房子。3）as引导定语从句时的用法①as引导限制性定语从句通常用于thesame…as,such…as结构中。e.g.Iwantthesameshirtasmyfriend’s.我要一件跟我朋友一样的衬衫。SuchmachinesasareusedinourworkshoparemadeinChina.我们车间使用的这种机器是中国制造的。②as引导非限制性定语从句既可放在主句之前，也可放在主句之后，用来修饰整个句子。通常用下列句型：asisknowntoall,asissaid,asisreported,asisannounced,asweallknow,asIexpect等。e.g.AsIexpected,hegotthefirstplaceagaininthismid-termexamination.正如我所预料的那样，他在这次期中考试中又获得了第一名。3）as引导非限制性定语从句时与which的区别①当主句和从句语义一致时，用as；反之，用which来引导非限制性定语从句。e.g.Hemadealongspeech,asweexpected.Hemadealongspeech,whichwasunexpected.②当非限制定语从句为否定时，常用which引导。e.g.Tomdrinksaloteveryday,whichhiswifedoesn’tlikeatall.2.关系代词在从句中作主语时，从句的谓语动词单数还是用复数应由先行词决定。e.g.ThemanwholivesdownstairsspeaksEnglishfluently.住在楼下的那个人英语说得很流利。ThestudentswhoareinGradeThreearegoingtoclimbthehilltomorrow.3.定语从句有时不直接紧靠先行词，中间由一个定语、状语或谓语隔开。e.g.ThereisanexpressioninhiseyesthatIcan’tunderstand.4.引导定语从句的关系副词有时可以用“介词+which”来代替。e.g.October1,1949wasthedayonwhich(=when)thePeople’sRepublicofChinawasfounded.5.当定语从句中谓语动词是带介词或副词的固定短语动词时，短语动词的各个固定部分不要拆开。e.g.Thesickmanwhomsheislookingafterisherfather.6.介词在关系代词前，只能用which和whom，且不能省略；介词在句尾，关系代词可有which,that,whom,口语中也可用who，且可省略。e.g.Theman(whom/who/that)youweretalkingabouthascometoschool.二、根据句子意思，在第一个空白处填入介词，在第二个填入关系代词whom或which:11.Theperson________________IspokejustnowisthemanagerthatItoldyouabout.2.Thepencil________________hewaswritingbroke.3.WuDong,________________Iwenttotheconcert,enjoyeditverymuch.4.Thetwothings________________MarxwasnotsurewerethegrammarandsomeoftheidiomsofEnglish.5.Herbag,________________sheputallherbooks,hasnotbeenfound.6.ThestoriesabouttheLongMarch,________________thisisoneexample,arewellwritten.三、选择填空：1.Theman____visitedourschoolyesterdayisfromLondon.A.whoB.whichC.whomD.when2.Thewoman____istalkingtomymotherisafriendofhers.A.whoseB.whoC.whomD.which3.Becauseofmypoormemory,all____youtoldmehasbeenforgotten.A.thatB.whichC.whatD.as4.Doyourememberthosedays____wespentalongtheseashoreveryhappily?A.whenB.whereC.whichD.who5.Tomdidnottakeawaythecamerabecauseitwasjustthesamecamera____helostlastweek.A.whichB.thatC.whomD.as6.Those____wanttogopleasesigntheirnameshere.A.whomB.whichC.whoD.when7.Whereistheman____Imetthismornin...
