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2013年高考英語復(fù)習(xí)：句型必備經(jīng)典(21)
虛擬語氣13.
Asif(though)+主語+did/haddone…表示過去的情況用過去完成時，表示現(xiàn)在和將來的情況用過去時
Ourheadteachertreatsusasifwewereherownchildren，soallthestudentsinourclassthinkhighlyofher.
AlantalkedaboutRomeasifhehadbeenthere.
Alltoooften，peopletreatAIDSpatientsasiftheywerebadordangerous.
75.關(guān)系代詞as，which的區(qū)別
(1).當(dāng)定語從句是否定句或表示否定時只能用which.
Hecamehereverylate，whichwasunexpected.
(2).當(dāng)as在從句中作主語是，后面常接動詞的被動語態(tài).如：beknown，besaid，bereported，beannounced.如從句的行為動詞是主動語態(tài)，一般用which作主語.
Shehasbeenabsentagain，asisexpected.
Tomhasmaderapidprogress，whichmakesmeveryhappy.
(3).As常用在as(it)seemslikely，as(it)oftenhappens，as(it)wasprintedout，as(it)wassaidearlier，asIremember(it)，asIunderstand(it)，as(it)appears.等結(jié)構(gòu)
Jackhaswonthefirstprize，asitoftenhappens.
ShehasreadwidelyinRomanticliterature，asitappearsfromheressay.
(4).As仍然保持作連詞時常有的某種含義.
Davidistall，asaremybrothers.
Heopposedtheidea，ascouldbeexpected.
(5).當(dāng)非限定性定語從句是一個復(fù)合結(jié)構(gòu)時，只能用which
Bettyalwaystellalie，whichherparentsfindstrange.
76.關(guān)系副詞where的用法；
高考對where的考察驅(qū)于復(fù)雜，從先行詞為明顯的地點，轉(zhuǎn)為地點模糊化.當(dāng)先行詞表示某人/物的situation，或某事物所發(fā)展的stage，或表示某事物的某方面時都可用where.
Eg.Theaccidenthadreachedapointwhereboththeirparentsaretobecalledin.
Wherewillallthistroublelead？
Thatiswhereyouaremistaken.
Youaresayingthateveryoneshouldbeequal，andthisiswhereIdisagree.
Icanthinkofmanycases，wherestudentsobviouslyknewalotofEnglishwordsandexpressionsbutcouldn’twriteagoodessay.
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