人教版（2019）选择性必修第二册 Science and Scientists Learning About Language表语从句课件（共23张PPT）.pptxVIP

Unit1ScienceandScientists

’Step1Lead-inMakingsentencesaccordingtothepictures.

Hisdiarrhoeaseemssevere.Thetwopoliciesarecontradictory.Thisisawaterpump.Hisjobistohandletheproblem.

Whatdothesentenceshaveincommonintheirstructures?predicative表语是用来说明主语的身份、性质、品性、特征和状态的，表语常由名词、代词、数词、动词过去分词、动词的-ing形式、副词、介词短语、形容词、不定式和从句等来充当。Hisdiarrhoeaseemssevere.Thetwopoliciesarecontradictory.Thisisawaterpump.Hisjobistohandletheproblem.

twocontradictorytheoriesTheoryone:__________________causedbybadairTheorytwo:__________________causedbygermsOnetheorywasthatbadaircausedthedisease.__________________主语系动词表语从句表语从句是指______________________,紧跟在________之后，对主语进行解释、说明，使主语的内容具体化。从句在句子中充当表语系动词

’Step2LearningAims1.理解:表语从句的结构及意义；2.掌握:表语从句的连接词及使用规则；3.运用:表语从句去表达自己的想法。

’Step3LearningContents1Link-v2表从引导词3表从的运用

系动词1

LinkingVerbs系动词be动词感官类变化类am,is,arelook，sound，smell，taste，feel，seem变得：become、get、turn、grow；保持：keep、hold、stay、stand;仍然：remain可以接表语从句系动词有：

从句引导词2

1.从属连词that引导的表语从句Thefactisthathewaslying.Thereasonisthattheynevergiveup.Hissuggestionisthatweshouldtellhim.Oneideaisthatfishisthebestbrainfood.that仅起_______作用，______(有/无)词义，______(是/否)充当句子成分，通常________(能/不能)省略。无不能不连接

1.从属连词whether引导的表语从句Thequestionisifwecanfinishourwork.Thequestioniswhetherthefilmisworthwatching.Thedoctor’sdoubtiswhethershewillsurvive.whether起_________作用，意为“_______”，在句中_________(是/否)作成分。(注意：if______(能/不能)引导表语从句)。连接是否不不能

1.从属连词asif/asthough/because引导的表语从句Itsoundsasif/thoughsomeoneisknockingatthedoor.Shelookedasifshehadbeenhitbylightning.Itseemsasifsheweremad.Hedidnotseethefilmlastnight.Thatisbecausehehadseenitbefore.asif/though在从句中________(是/否)充当成分，意为“______________”;若表语从句所述的是非真实的情况，从句用_________(主句一般现在时，从句用_________时；主句过去式，从句___________时)；because在从句中_______(是/否)充当成分，意为“______________”不似乎；好像虚拟语气一般过去过去完成不因为

表语从句的虚拟语气一坚持（i