英语主语从句

SubjectClause主语从句宾语从句主语从句同位语从句表语从句名词性从句SubjectClause内容主语从句的考点主语从句三要素主语从句定义SubjectClause内容主语从句的考点主语从句三要素主语从句定义SubjectClauseFindouttheSubjectinthefollowingsentences:1.Atreehasfallenacrosstheroad.2.SheisfromChina.3.Tofindyourwaycanbeaproblem.4.Smokingisbadforyou.5.Whatshesaidisnottrue.6.Wheneveryoufinishthetaskiscertainlyallright.名词代词不定式动名词句子句子SubjectClauseConclusion:Aclause(subordinateclause)whichservesassubjectofasentencecanbecalledSubjectClause.观察以下句子，注意主语从句的特点：Thattheearthtravelsroundthesunisa–well-knownfact.Whethertheartistcandoitornotisuncertain.Whyhediditremainsamystery.Whoeverbreaksthelawwillbepunished.SubjectClause内容主语从句的考查难点主语从句三要素主语从句定义SubjectClause主语从句3要素从句语序陈述语气：先主后谓谓语动词常用单数1.Whathesaidmakesmesad.2.Whyhemadesomanymistakesisnotclear.引导词SubjectClause主语从句的引导词•从属连词：that,whether•连接代词：who(ever),which(ever),what(ever)•连接副词：where(ever),when(ever),why,howSubjectClause主语从句引导词的选择主要是根据从句的结构和意义来选择：1.连接词：that;whether如果从句的意义和结构完整，则选用that或whether。-that本身没有意义，不作句子成分，只表示从句的开始，位于句首时，that不能省略.-whether表示“是否”，不作句子成分,位于句首。1）______peoplecutdowntoomanytressdestroyedthebalanceofnature.2)_______wewillgocampingtomorrowdependsontheweather.3)________thesolidshapewouldlastornotisnotclear.4)_______youwillwinthemedalseemsunlikely.ThatWhetherWhetherThat2.连接代词：who,which,what（什么，所…的）,whose,whomWhoever/whichever/whatever在主语从句中不含有疑问意义。如果从句的意义和结构不完整，根据从句的意义和结构选择相应的连接代词。连接代词在从句中起名词性作用，担当一定成分（主语、宾语、表语等）。SubjectClause1._________willtakepartinthemeetinghasnotbeendecided.2._________studentwillwinfirstisuncertain.3._________Icantunderstandiswhyhehaschangedhismind.4._________failstoseethiswillmakeamistake.5.________wassaidheremustbekeptsecret.WhoWhichWhatWhoeverWhatever3.连接副词：where(ever),when(ever),why,how连接副词when,where,why,how在从句中作(时间、地点、原因、方式)状语。1）___________weshouldleaveitisaproblem.2）___________hewillbebackdependsontheweather.3)__________thishappenedisnotcleartoanyone.4)_________theseGreekstatuesareinaBritishmuseumisanimportantpartofourstorytoday.SubjectClauseWhereWhenHowWhy总结做题突破方法三部曲一、首先分清主句和从句二、分析从句缺何种成分三、根据分析，选择恰当的连接词SubjectClauseeg.____________theywouldsupportuswasaproblemWhether内容主语从句定义SubjectClause主语从句三要素主语从句的考查难点主语从句的考查难点主语从句有时为了使句子结构平衡，避免句子“”头重脚轻“”，常用it作形式主语代替主语从句，放于句首，而把真正的主语（即主语从句）置于句末。主语从句后的谓语动词一般用单数形式。常用句型如下：•（1）It+be+名词+that从句名词有（nowander,anhonor,apity,afact,ashame,goodnews,asurprise,etc）1.___________________(遗憾的是)thatwelostthegame.2.___________________(惊奇的是)thathecheatedintheexam.3.___________________(事实是)thatEnglishisbeingacceptedasaninternationallanguage.4.___________________(不足为奇的是)thatcomputersaretakingovertheworld.ItisnowonderItisapityItisasurpriseItisafactSubjectClause（2）It+be+形容词+that从句形容词有（obvious,true,natural,good,wonderful,funny,nosurprising,possible,certain,likely,fortunate,doubtful,etc）1._______________(有必要)thatanefficientworker(should)accomplishhisworkontime2.____________________(重要的是)thatyou(should)thinkbeforeyousayordoanything3.___________________(很明显)thatthismeasureiseffective.SubjectClauseItisobviousItisnecessaryItisimporatantthat常含有一个表示“有必要的”之类的形容词。在这种结构中，从句应当“…+that+主语+(should)+动词原形”形式（should常予以省略，而直接接动词原形）。常见的此类形容词有“important/imperative/necessary/essential有必要的、urgent迫切需要的、desirable合意的..等