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1、Unitl学案(1)Be动词有三个,am,is还有are.我用am,你用are,is跟着他她它,复数全都用are.如果遇到过去时,was来把am,is替,were来把换掉动词are.顺口溜:be氏三朵花,am,is还有are,我(I)恋am,你(you)恋are,is跟了他(he)她(she)它(it),单娶is,复娶are。详细讲解:英语的be动词是个用法比较复杂的动词。复杂的原因有两点:1、除了原形的be之外,对于不同人称代词以及单数名词和复数名词,be会有各种变化形式和缩写形式。概括一下有七种形式:be,am,is,are,was,were,
2、been,beingo它们与人称代词和名词单、复数的搭配关系是:现在时Iam,youare,he/she/it/is,we/you/theyare;名词单数、不可数名词用is,复数用areo缩略式rm,you're,he's,we're,you're,they,re否定缩略式I*mnot,isn't,aren,t过去时1was,youwere,he/she/it/was,we/you/theywere;名词单数、不可数名词用was,复数用were。杏定缩略式wasn't,weren't过去分词been现在分词being2、在句了中,be有两种主要作
3、用:一是作为系动词(TheLinkingVerb),木身可以作用谓语动词;二是做为助动词(TheAuxiliaryVerb),与谓语动词一起构成各种时态和被动语态等。下面做个简要的讲解。一、be动词做系动词1、系动词+表语”的结构当be动词做系动词使用时,主要构成“系动词+表语”的结构,在句子中做谓语。表语可以是名词、形容词、副词、介词短语等。例如:Themanisascienceteacher.Mary'snewdressesarecolourful.Motherisinthekitchennow.2、be动词的一般疑问句,方法是把be移到主语前
4、面,也可说成是移到句首。Isthemanascieneeteacher?Yes,heis./No,heisn't.AreMary'snewdressescolourful?Yes,theyare./No,theyaren't.Wasmotherinthekitchenthen?Yes,shewas./No,shewasrft.Wereyouathomethedaybeforeyesterday?Yes,1was./No,1wasn,t.Wasshelatethismorning?Yes,shewas./No,shewasn't.3、be动词用在特殊
5、疑问句在特殊疑问句里,be动词仍然移到主语前面,但特殊疑问句是以特殊疑问词开头的,所以be动词只能说是移到主语前面,或者说是在特殊疑问词的后面。例如Whosebikeisbroken?XiaoMing,sbikeis.Whowassingingintheroom?Mr.Zhangwas.Whereareyoufrom?IamfromWuhu.Whatclasswereyouin?WewereinClass2.HowoldisTom?Heisten.4、be动词的否定句be动词做谓语时,它的否定形式是在be后加not,并且可以缩写。例如:Itisno
6、tsunnytoday.Tomandhisfriendsarenotinthepark.YouwerenotnineyearsoldwhenIwenttotheuniversity.Hewasnotoftenlateforhisclasswhenhewasastudent.Twasn>thereyesterday.MyparentswcrerftathomelastSunday.5、be动词的祈使句be动词的祈使句有肯定和否定两种形式。肯定形式是以be动词开头,而否定形式或强调句形,要加dont或do。例如:Becareful!Beagoodboy
7、!Don'tbesilly!Don'tbeafool!Dobeobedient!Dobecareful.二、be动词做助动词助动词be有两个基本用法,一是与谓语动词一起构成各种时态,二是构成被动语态。1、“be+现在分词组”成各种进行式时态。例如:Tony'smaidiswashinghisnewcar.Thechildrcnareplayinginthefield.Samuelwaseatingwhen1camein.Wehavebeenlivingheresince1959.Thistimenextdaytheywillbesittingint
8、hecinema.四.therebetherebe句式为:therebe+主语部分+状语部分,表示"某处存在某物〃,be常