名词性从句精炼名词性从句包括主语从句﹑宾语从句﹑表语从句和同位语从句。引导词的正确选用：1）顺句意2）注意引导词的功能及是否省略。1．1)____hewillcometomorrowisn’tknown..2)____hewillcometomorrowisknown..3)____isknown,hewillcometomorrow.4)____isknownthathewillcometomorrow.5)____isknownisthathewillcometomorrow.A.WhetherB.ThatC.AsD.WhatE.It2.1)Thenews____hetoldmewasn’ttrue.2)Thenews_____hepassedtheexammadeushappy.A.thatB.thatorwhich二．注意几种易混连接词的区分：If与whether：If不引导主语、表语、同位语从句，If不能与不定式、介词、ornot直接连用。如：1)________hewillcomeornotmakesnodifference.2)Thequestion_________weneedithasn’tbeendecided.3)Itdependson________hewillhelpusornot.2．doubt的用法：Idoubt______hewillcome.Idon’tdoubt_______hewillcome.Doyoudoubt______hewillcome?3.whoever,whatever,whenever……相当于nomatterwho,what,when…但nomatterwho,what,when……只作让步状语。1)Whoevercomesiswelcome.(true)Nomatterwhocomesiswelcome.(false)2)Howeverlateitis,motherwillwaitforhim.(true)三、几种易混从句总结如下。定语从句与表语从句。1)Isthisoffice____youvisitedyesterday?2)Isthistheoffice_____youworkedtwoyearsago?3)Ouraimis_____ourcountryshouldbebuiltintoamodernpowerfulsocialistcountry.A.whereB.thatC.whichD.theone2.定语从句与同位语从句。1)Thenews__ourfootballteamwonthematchwasencouraging.2）Thenews____weheardontheradiowasn’ttrue.A.thatB.whichC.whatD.as3.定语从句与结果状语从句。1)Sheissuchagoodgirl____wealllike.2)Sheissuchagoodgirl____wealllikeher.A.asB.thatC.whoD.which4.主语从句（形式主语）与强调句。1)Itwasinthestreet____Imethimyesterday.2)Itisimportant___weshouldlearnEnglishwell.A.whenB.whatC.thatD.which5.目的状语从句与结果状语从句。1)Hegotupearlysothathecouldcatchtheearlybus.2)Hegotupearlysothathecaughttheearlybus.6.定语从句与强调句。1)Itwas8:00P.M.___hecameback.2)Itwasat8:00P.M.___hecameback.A.whenB.thatC.whichD.what7.1)Itwillbethreeyears____wemeetagain.2)Ithasbeenthreeyears____hejoinedthearmy.A.beforeB.sinceC.afterD.when8.定语从句与主语从句。1)_____isknowntoall,heisagoodleader.2)____isknowntoallthatheisagoodleader.3)_____isknowntoallisthatheisagoodworker.A.AsB.WhatCItD.Which