浙江省温州市永嘉中学教育集团楠江校区高二英语Unit4Astronomythescienceofthestarslanguagepoints教案TeachingGoals:1.TogetSstoknowhowtousenewwordsandphrases.2.TohelpSstomastersomenewwordsandexpressions.3.TogetSstohavetheknowledgeofthisgrammarpoint:nounclausesasthesubjectTeachingProcedures:Step1.ConsolidationPurpose:Toconsolidatethewordsandphrasesinthetext.1.AskSstoworkingroupsandreadthetextagain,andthenfinishEx1andEx2onP28andchecktheanswersingroups.2.AskSstokeepthewordstheyfilledinEx1inheart.3.AskSstofinishEx3andthenletthemcheckeachother’sanswers.Step2.GrammarPurpose:TogetSstorecognizenounclausesasthesubjectandtomakesurethattheycandosomesimpleexercises.1.DivideSsintofourgroupsandaskthemtofinishEx1ofDiscoveringUsefulStructuresonP29.Andthenletthemdrawaconclusionaboutthegrammarpoint.Seewhichgroupunderstanditbestandhaveamemberofthegrouppresentbeforetheclass.2.Afterthepresentation,explainthegrammarpointforSs.3.LetSscompleteEx2onpage29afterlearningthegrammar.Purpose:TogetSstounderstandtheusageofnounclausesasthesubject.(1)主语从句的语序主语从句要求使用陈述句语序，而非一般疑问句语序。如：Whatsurprisedmemostwasthatthelittlegirlcouldplaytheviolinsowell.使我感到惊讶的是这个小女孩的小提琴拉得太好了。Howhewassuccessfulisstillapuzzle.他是如何成功的仍然是个谜。(2)连接词的选用①that和what的选用that和what都可引导主语从句。what除起连接作用外，还在名词性从句中充当某些成分可作从句的主语、宾语或表语。而that在名词性从句中不充当任何成分，无词义，只起连接词作用。如：Whathewantsisabook.他想要的是一本书。Thatlighttravelsinstraightlinesisknowntoall.众所周知，光线沿直线运行。②if和whether的选用引导主语从句，不能用if，只能用whether。如：Whetherwewillholdapartyintheopenairtomorrowdependsontheweather.我们明天是否在户外开晚会要看天气而定。③其它连接代词和副词的选用根据主语从句的具体意义，正确的选择who,which,when,where,why,how等连接词，这些连接词既有疑问含义，又起连接作用，同时在从句中充当各种成分。如：Whenweshallholdoursportsmeetisnotdecided.我们何时举行运动会还没有决定。Whobroketheglassyesterdayisnotclear.还不清楚昨天谁打破了玻璃。Whichcaryouwillchoosetobuymakesnodifference.你决定买哪一辆车都不会有任何区别。④whatever/whoever的功用whatever,whoever在主语从句中不含疑问意义。它引导主语从句，并在从句中作主语、宾语、表语等。whatever=anythingthat;whoever=anyonewho。要注意和whatever,whoever引导的让步状语从句的区别。如：Whoeverbreaksthelawshouldbepunished.（主语从句）（＝Anyonewhobreaksthelawshouldbepunished.）Whoeverbreaksthelaw,heshouldbepunished.（让步状语从句）（＝Nomatterwhobreaksthelaw,heshouldbepunished.）(3)it构成的主语从句①由连词that引导的主语从句，在大多数情况下会放到句子的后面，而用代词it作形式主语。如：Itiswell-knownthattheearthmovesaroundthesun.众所周知，地球围绕太阳转。需要注意的是，it作形式主语代替主语从句时，要注意和as引导的定语从句的区别。试比较：ItwasreportedthattheUSwasundertheterroristattack.（主语从句，有that，无逗号）Aswasreported,theUSwasundertheterroristattack.（定语从句，无that，有逗号）上两句意为“据报道，美国遭到恐怖分子的袭击”。②常见用it作形式主语的复合句结构◆Itisafact（agoodidea/apity/ashame/nowonder/goodnews…）that…如：It’sapitythatyoumissedthefilm.你没有看那部电影真是太遗憾了。◆Itisnecessary（clear/true/strange/important/wonderful/possible/likely…）that…需要注意的是，这类主语从句中，谓语动词很多为“（should）＋动词原形”，即要用虚拟语气。如：Itisnecessarythatyou（should）...
