UNIT3SECTIONB语法知识动词的语态-被动语态DISUNIM引导的否定前缀人教版英语九年全册课件

语法知识：动词的语态——被动语态Unit3Couldyoutellmewheretherestroomsare?SectionB

考点一：动词语态分为？动词的语态分为主动语态和被动语态。eg:Ibreakthewindow.(主动语态)

主动语态的主语是动作的执行者。Thewindowisbrokenbyme.（被动语态）被动语态的主语是动词的承受着。考点二：主动语态变被动语态1、主动语态变被动语态的方法：主变宾（作宾语），前加by宾变主(做主语)动变被（be+V过去分词）2、被动语态的句子结构：主语+be+动词的过去分词+(by)+宾格---We

speak

English

everyday.English

isspoken

by

us

everyday.切记：be随时态、主语而变化一般现在时的被动语态结构主动语态结构被动语态结构主+V主+V-s/es（主语是单三）主+am/is/are+V-过去分词Eg:

Idomyhomework.Myhomeworkisdonebyme.一般过去时的被动语态结构主动语态结构被动语态结构主+V过去式主+was/were+V-过去分词Eg:

Weplantedmanytreesyesterday.Manytreeswereplantedbyusyesterday.一般将来时的被动语态结构主动语态结构被动语态结构主+will+V主+will+be+V-过去分词Eg:

Shewillplaybasketballtomorrow.Basketballwillbeplayedbyhertomorrow.现在进行时的被动语态结构主动语态结构被动语态结构主+be+V-ing主+am/isare+being+V-过去分词

Eg:

TheyarelisteningEnglishclassnow.Englishisbeinglistenedbythemnow.现在完成时的被动语态结构主动语态结构被动语态结构主+have+V过去分词主+has+V过分(主语是三）主+have/has+been+V-过去分词Eg:

Lucyhasalreadydrawnthreepictures.ThreepictureshavebeendrawnbyLucy.含情态动词的被动语态结构主动语态结构被动语态结构主+情态动词+V主+can/may/should/must+be+V-过去分词Eg:

YoucanspeakEnglishverywell.Englishcanbe

spokenbyyouverywell.把以下句子改为被动语态：1.Mike

broke

the

window

yesterday

evening.

2.Wemayputtheflowersintheclassroom.3.MoreandmorepeoplecanspeakChineseinwesterncounttries4.Shebreakstheblueglass.5.Thewriterwrotethestoryinthe1960s.6.Theywillbuildaschoolinthatvillage.7.IhaveturnedofftheTValready.8.Youmustreadthebookintime.9.Look,thestudentsareplantingtrees.dis-,un-,im-引导的否定前缀12Guessingthemeanings1.Bob'sparentsdiedinacaraccident,andheisunhappyandverylonely.2.Lucywantedtohelpdisabledchildren.adj.不开心的adj.丧失能力的，有残疾的英语语法－否定前缀

dislike

unusual

irregular

inexpensive

impolite

illegal否定前缀

常见否定前缀：定义：翻译：在单词的词首加上一个表示相反含义的词缀。知识讲解“非”、“无”、“不”、“未”等。dis-im-,il-,in-,ir-;un-non-mis-...15dis-知识讲解1.disadvantagedisagreementadj.2.dislikedisagreedisappearn.3.dishonestdishonorablev.小结：dis-常加在形容词，名词，动词前。前缀一般改变单词的意义，但不改变词性。16un-知识讲解1.unhappyunusualunimportantuncomfortableuncommonadj.2.unhappinessn.3.unlockunfoldundressv.表示做相反的动作4.unexpectedunfinishedunmarried动词过去分词之前小结：un-常加在形容词，副词，名词，动词及动词的过去分词前。17im-知识讲解

impossibleimpolite小结：im-常加在字母m,b,p开头的形容词和名词之前。imbalanceadj.n.用单词的适当形式填空。4.Jim______________(like)English,becausehethinksit'sdifficulttolearnwell.2._________________(luckily),hefailedhisfinalexam.3.It's__________________(possible)forthelittleboytocarrysuchaheavybox.课堂练习1.It's________________(polite)tostareatagirl.dislikesimpossibl