1、Astronomy:the science of the stars -grammarSubjectSubjectTask1:找出下列句子的主语。1.Atreehasfallenacrosstheroad.2.Youareastudent.3.Tofindyourwaycanbeaproblem.4.Whatshesaidisnotyetknown.5.Thatweshallbelateiscertain.在复合句中充当主语的从句,叫做主语从句。在复合句中充当主语的从句,叫做主语从句。SubjectClause主语从句主语从句Task2:找出下列句子的主语。找出下列句子的主语。1.Thathe
2、willcomeiscertain.2.Whetherhewouldsupportuswasunknown.3.Whathesaysisnotimportant.4.Whowilltakepartinthemeetinghasnotbeendecided.5.Whichsidewillwinisnotclear.SubjectClause主语从句主语从句一般来说主语从句都是放在一般来说主语从句都是放在。句首句首6.Whosewatchwaslostisunknown.7.Whyhediditremainsamystery.8.Whentheywillstartisnotknownyet.9.H
3、owhebecameagreatscientistisknowntousall.10.Whereshehasgoneisnotknownyet.思考:主语从句有哪些连接词?这些连接词思考:主语从句有哪些连接词?这些连接词是否充当成分?有无意义?是否充当成分?有无意义?从属连词:从属连词:连接代词:连接代词:连接副词:连接副词:that、whetherwhat、who、which、whosewhen、where、why、howwhatever、whoever、whichever从属连词从属连词:that引导主语从句只起引导作用,本身引导主语从句只起引导作用,本身无无实际意义,在主语从句中不充当任
4、何成分,但实际意义,在主语从句中不充当任何成分,但不可不可省略省略。whether引导主语从句,本身有实际意义,是引导主语从句,本身有实际意义,是否的意思,否的意思,在主语从句中不充当在主语从句中不充当任何成分任何成分连接词连接词:how,wh-引导主语从句,本身有实际意义,在引导主语从句,本身有实际意义,在主语从句中充当句子成分。主语从句中充当句子成分。主语从句中缺状语用主语从句中缺状语用连接副词连接副词:when、where、why、how主语从句中缺主语,宾语,表语,定语用主语从句中缺主语,宾语,表语,定语用连接连接代词代词:what、who、which、whose等Task3:用合适的
5、连接词填空。1._teamwillwinthematchisstillunknown.2._weneedismoretime.3._theearthisasolidballisknowntousall.4._themeetingwillbeheldnextweekhasntbeendecidedyet.5._theplanwillbecarriedoutisunknown.WhichWhatThatWhether Where/Whether/When6._wecanarriveattheairportbefore8oclockisstillaquestion.思考:怎样确定连接词?思考:怎样确
6、定连接词?Step1:找主语从句找主语从句Step2:分析主语从句缺不缺成分分析主语从句缺不缺成分Step3:翻译整个句子,结合意思翻译整个句子,结合意思Whether/HowTask4根据下列句子中的错误,总结注意事项。根据下列句子中的错误,总结注意事项。1.Whenwillhecomeisnotknown.hewill总结总结:2.HewillnotcometothemeetingthiseveningThatheistrue.总结总结:主语从句要用主语从句要用陈述语序陈述语序。that引导主语从句位于句首引导主语从句位于句首不可省略不可省略。3.Ifthemeetingwillbeput
7、offhasnotbeendecidedyet.Whether总结总结:4.Whenhewillcomeareapuzzle.isWhenwellholdthemeetingandwherewellholdithasnotbeendecided.have总结总结:if和和whether均可表示均可表示“是否是否”,但在,但在引导位于引导位于句首的主语从句时,只能选用句首的主语从句时,只能选用whether不能用不能用if。单个从句做主语,谓语动词用单数;两个或两单个从句做主语,谓语动词用单数;两个或两个以上从句做主语,谓语用复数。个以上从句做主语,谓语用复数。注意注意1:Whatheneeds
8、isthatbook.(be)Whatheneedsaresomebooks.(be)总结:总结:What引导主语从句时,谓语动词引导主语从句时,谓语动词be与做表语的名词单复数一致。与做表语的名词单复数一致。注意注意2.Thatweshouldworkhardatschoolisimportant.Itsimportantthatweshouldworkhardatschool.总结总结:在主从复合句中,如果主语从句太长,为了避在主从复合句中,如果主语从句太长,为了避免句子结构头重脚轻免句子结构头重脚轻,经常用经常用_作形式主语作形式主语,而把主语从句放在主句的谓语动词之后。而把主语从句放在
9、主句的谓语动词之后。itEx:改写下列句子。1).Thathedidntcomeisapity.2).Whentheplaneistotakeoffhasntbeenannounced.3).Thatwearelateisobvious.Itisapitythathedidntcome.Ithasntbeenannouncedwhentheplaneistotakeoff.Itisobviousthatwearelate.Ex1:单句改错。1.Thatiscertainthatwecanwin.2.Youhavemadeamistakeisafact.3.Whereshallwespendth
10、eholidayisntdecided.Itwe shallThat4.Whetherwewillgoforanoutingtomorrowremainunknown.5.Howcausedtheaccidentisstillamystery.remainsWhatEx2.完成句子。1._(谁会赢得比赛)isunknown.2._(我们得不到的)seemsbetterthanwhatwehave.3._(我在哪里过暑假)isnoneofyourbusiness.4.Itisapity_(你错过了班车).WhowillwinthegameWhatwecantgetWhereIspendmysum
11、merholidaythatyoumissedthebus5.Itisreported_(很多人把英语作为第一或第二语言)。6._(更重要的是)isthatwemustformagoodhabitoflearningEnglish.7.很显然她在说谎。_8熟能生巧是有道理的。_thatmanypeopleconsiderEnglishasthefirstorsecondlanguage.WhatismoreimportantItisobviousthatsheistellinglies.Thatpracticemakesperfectisright.DiscussionSinceyouente
12、redhighschool,youmusthavemetwithsomeproblemsinyourstudyorlife.Onecantalkabouttheproblems.Theotherscangivesomeadvice.Trytousethefollowingstructures:Thedifficultyis.whatIfinddifficultis.Thetroubleis.whatworriesmeis.Myadviceis.whatIwouldadviseis.Ithinkthat.whatIthinkis.Iwanttotellyouthat.whatIwanttosayis.【自我评价】【自我评价】1是否能正确无误地找出主语从句?是否能正确无误地找出主语从句?能能_否否_2是否能选出正确的引导词?是否能选出正确的引导词?能能_否否_3是否掌握了主语从句的易错点?是否掌握了主语从句的易错点?能能_否否_4是否能用主语从句正确交流?是否能用主语从句正确交流?能能_否否_Homework:根据表格内容,以根据表格内容,以HowtolearnEnglishwell?为题写一篇短文,可以自由发挥,为题写一篇短文,可以自由发挥,在短文中尽可能运用主语从句。在短文中尽可能运用主语从句。