Unit 1 Science and Scientists Discover useful structures 表语从句 课件高中英语人教版（2019）选择性必修第二册.pptx

Unit1GrammarPredicativeClause

Learningobjectives:Inthisclass,youwill:1.knowabouttheusageofpredicativeclause.2.usepredicativeclausestomakesentence.

Hisdiarrheaseemssevere.Thetwopoliciesarecontradictory.Thisisawaterpump.Hisjobistohandletheproblem.predicative

Iamateacher.Iamten.Hebecamerichandsuccessful.?Everyoneishere.Theyareathomenow.MyjobistoteachthemEnglish.Thefactisthathepassedtheexam.名词数词形容词副词介词短语不定式从句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。

在复合句中充当表语的从句叫表语从句。位于主句的系动词之后，对主语进行解释、说明，使主语的内容具体化。表语从句必须用陈述语序。

系动词的分类1.感官类系动词（sound,look,taste,smell,feel)2.变化类系动(get,fall,grow,turn,go,come,become…)be动词3.状态类系动词保持类系动词（keep,remain,stay,lie,stand）似乎类系动词（seem,appear）证明类系动词（prove,turnout)（am,is,are,was,were)系动词Linkingverbs

Thestructureofpredicativeclause.主语+系动词+引导词+简单句Thisiswhyhedidit.e.g.WhatIwanttosayisthatIamtired.表语从句

连接词从属连词:that,whether,asif,asthough,because…连接副词:when,where,how,why连接代词:what,who,whom,whose,which,…+ever二、引导词Conjunctionwords（在从句中不作成分）（在从句中作主语、宾语、表语、定语）（在从句中作状语）

表语从句引导词的选择WhatIcanseeis_____thepolicearetrainedtodefendthemselvesagainstattacks.Thepolicearetrainedtodefendthemselvesagainstattacks.whatIcanseethat从属连词that不做成分,没有意义，连接作用，不能省略

表语从句引导词的选择Thequestionis___________theycouldhandletheproblem.Theycouldhandletheproblem.thequestionwhether从属连词whether不做成分,但有意义，表“是否”

表语从句引导词的选择Darkcloudsaregathering.Itseems________itisgoingtorain.asif看起来好像要下雨了。与事实相符，用正常的陈述语气。

表语从句引导词的选择Helooked________hehadseenaghost.asif他看起来好像见鬼了一样。与事实不符，表示对过去的虚拟，用过去完成式。

表语从句引导词的选择Hefeltfrustrated.Thats__________hefailedintheexam.Hefeltfrustrated.Hefailedintheexam.because