高中英语新人教版选择性必修第二册Unit1ScienceandScientistsPeriod3Discoveringusefulstructures课件(共20张)

人教版选择性必修二Period3DiscoveringusefulstructuresThePredicativeClausesUnit1ScienceandScientists1.EnabletheSstomastertheusageofpredicativeinthisunit.2.EnabletheSstousethepredicativepatternsflexibly.3.TraintheSstoapplysomeskillsbydoingtherelevantexercises.TeachingGoalsGrammarfocus:PredicativeclausesThequestioniswhowilldoit.定义：表语从句放在

之后，充当复合句中的

。结构:

Itseemsthatitisgoingtorain.Itlooksasifheisunhappytoday.自我探究主语+系动词+引导词+简单句系动词表语Underlinealltheexamplesinthereadingpassagewherenounclausesareusedasthepredicative.Thenstatetheirmeaningandfunctions.1.Onetheorywasthat_____________________________________2.Anotherwas______________________________________3.Thetruthwas__________________________________thatcholerawascausedbyaninfectionfromgermsinfoodorwater.badaircausedthedisease.thatthewaterfromtheBroadStreetpumphadbeeninfectedbywaste.S+V+PlinkverbPredicative表语Predicativeisused______thelinkverb.AsentencewhichisusedaspredicativeisPredicativeClause表语从句.①be动词;②感官动词：sound,taste,smell,look,feel;behindItlookasif…Itturnedoutthat…总结Grammarfocus:表语从句之引导词1.引导词的用法(that)

that在表语从句中

,又

且______

省略。1.Thefactisthat

hehasn’tyetrecoveredfromillness.2.Thereasonwhyhehastogoisthathismotherisillinbed.

既不充当成分没有意义不可whether在表语从句中表

,

但_______句子的成分。

1.Whatthedoctorreallydoubtsiswhether

mymotherwillrecoverfromtheseriousdiseasesoon.2.Thequestioniswhether

itis

worthdoing.“是否”2.引导词的用法(whether)不充当√iforwhether?if/whether

whether√what

在表语从句中充当______________

表示____________________________.1.Thequestionis

whatcausedtheaccident.

2.Thatmountainisnolongerwhatitusedtobe.3.Whathetoldyouwaswhat

hadbeendiscussedatthemeeting.主语、表语、宾语什么，什么样子，或所…的（人或事）3.引导词的用法

(what)主语表语宾语

who在表语从句中充当______________表示____.Theproblemiswhocoulddothework2.Mytroubleiswho(whom)I

canturnto.主语、宾语或表语谁4.引导词的用法

(who)主语宾语

which在引导表语从句时,常充当_____________

表示

。

Ireadaboutitinsomebookoranother,butwhatIdon’tknowiswhich(book)itis.

定语,表语其/当中哪一个5.引导词的用法(which)定语由asif,asthough引导表语从句，表示

。句子中的系动词常用look,appear,seem等。1.It

looks

asifitwasgoingtorain.2.Theyoungmanwithlonghairlooks

asifhewereagirl.

6.引导词的用法（asif,asthough）好像

当主句的主语为reason,或者是由why引导的从句时,与它们相关的表语从句用_________,而不能由__________引导;because引导表语从句时只能用于___________________________________句型中.1.ThereasonwhyIwaslatewasthat

Imissedthetrain.2.Iwaslate.It/That/Thiswasbecause

Imissedthetrain.thatbecauseIt/That/Thisis/wasbecause…7引导词的用法（thereasonwhy…isthat/Itisbecause…）当表语从句中主语、宾语、表语具备，但是还是要表示疑问含义，可以判断句子中缺少状语，常常用相应的特殊疑问词引导，有why表

,when表

,where表

,how表

等。Thisishowhedidit.Thatiswhythebrotherswantedtomakeabet.That’swhywe’vegivenyoutheletter.8.引导词的用法(why/when/where/how)为什么在…时候在哪里怎么样

Answerthefollowingquestionsusingtheinformationfromthereadingpassageaswellast