初中英语动词时态讲解ppt课件.ppt
初中英语动词时态讲解,Fun With English!,动词的构成,be 动词助动词情态动词系动词实义动词,be 动词,be动词的几种形式am is arewas werebeingBeen,be动词的用法,与名词、数词、形容词、介词连用I am a doctor.He is ten.They are tired.The cat is under the table.,be动词的用法,There be 句型用于不可数名词和可数名词单数之前There is a pen on the desk.There is some water in the glass.用于复数名词之前There are some sheep in the hill.用于一般将来时There is going to be a film in our school next Sunday.用于一般过去时There was a book on the desk yesterday.注意：请根据时态和句中的名词选择适当形式。,be动词的用法,Be 动词在时态中的运用在现在进行时中 We are talking.在过去进行时中 We were talking at this time yesterday.,助动词,助动词的几种形式do/dont Does/doesntDid/didntwill/wonthave havent/has hasnt/had hadnt,助动词的用法,对句子进行否定和疑问Do you get up early every day?I didnt have lunch yesterday.Will you be back soon?He hasnt finished the work yet.在反意疑问句中He works in a school,doesnt he?She has never been there,has she?在倒装句中They helped the farmers,so did we.I wont visit the famous singer,neither will he.,情态动词,共同特点情态动词后面跟动词原型无论否定、疑问、倒装句、或反意疑问句都用情态动词只有时态变化，没有人称变化,情态动词,解释can/could在表示请求允许的时候两者和互换，could比can语气更委婉。Can I help you?Could you open the window?在表示有能力作某事时，could是can的过去式。I can swim.I could swim at the age of five.,情态动词,解释Must/have toMust 表示主观意愿，否定句用Mustnt，否定回答用needntI must go now.You mustnt play in the street.Must I clean the room now?No,you neednt.have to表示客观条件的限制的“不得不”，它有时态和人称变化，需要助动词来否定和疑问。I dont have to carry the big box.He had to wash his clothes.,情态动词,解释May 表示请求别人允许。May I use your bike?表示可能性。He may be a teacher.He may live in this building.,系动词,我们所学过的系动词是Get，turn，be come，be动词感观动词look，sound，smell，taste，feel系动词只和形容词连用，构成系表结构I feel hungry.The day gets longer and longer.He looked happy.,实义动词,实义动词指的是有具体行为意思的动词。实义动词在句中可以做谓语动词和非谓语动词。做谓语动词的用法 动词会有四种形式：单三，现在分词，过去式，过去分词,实义动词,注意：掌握四种形式的变化规律He works in the office.We are dancing together.I caught a cold last week.She has watered the flower.,实义动词,做非谓语动词的用法（指出现在谓语动词之后的动词，它受前面谓语动词的限制）动词会有三种形式：原型(do)动名词(doing)不定式(to do),实义动词,用原型：let sb.domake sb.dohelp sb.(to)dohad better do,实义动词,用动名词：like doingenjoy doingfinish doing介词之后用动名词 be good at doingwhat about doingthank you for doing,实义动词,用不定式：want to dodecide to doplan to dowould like to dolearn to dotell sb.(not)to doask sb.(not)to do,实义动词,注意下列词不同形式的不同用法:remember doing/to do forget doing/to do stop doing/to do go on doing/to do,时态,一般现在时一般将来时一般过去时现在进行时现在完成时过去进行时过去将来时过去完成时,一般现在时,表示一般情况和经常发生的动作。时间状语为every day 或 every 引导的时间状语often，always，usually,一般现在时,动词碰到第三人称单数时，要加“s”work-works辅音字母和“y”结尾的词，如carry-carries以s、x、ch、sh结尾的加“es”，如wash-washesgo-goesdo-doeshave-has,一般现在时,例句He goes to school on foot every day.We often have supper at home.She doesnt do her work every Sunday.,现在进行时,表示正在发生的动作。时间状语：now/Look/Listen由be动词动词ing构成动词变化加ingclean-cleaning以不发音“e”结尾的，去掉字母“e”，再加ingmake-making重读闭音节的单词，双写最后一个字母，再加ingswim-swimming,现在进行时,例句The boys are playing now.Look!They are planting trees.Listen!He is singing.,一般将来时,表示将来发生的动作。时间状语：next 引导的词组tomorrow 引导的词组the day after tomorrow动词变化：will+动词原型例句I will visit you tomorrow.He wont come back next week.,一般过去时,指过去发生的动作或事情时间状语：yesterday 引导的词组ago 引导的词组last 引导的词组the day before yesterday,一般过去时,动词变化：动词变成过去式，动词加“ed”Play-played辅音字母和“y”结尾的词，如carry-carried重读闭音节的单词，双写最后一个字母，再加edstop-stopped不规则动词见书后动词表,一般过去时,例句He bought a book yesterday.I watched a match last week.He left here two days ago.,现在完成时,动词变化 动词变成过去分词加edPlay-played辅音字母和“y”结尾的词，如carry-carried重读闭音节的单词，双写最后一个字母，再加edstop-stopped不规则动词见书后动词表动词由have（has）+过去分词 构成,现在完成时,表示动作已经完成He has left.I have already had a rest.表示动作不仅已经完成，还要持续（在这个用法当中，动词要用延续性动词，与for引导的一段时间和since引导的短语连用）He has been away for two days.I have already taught in this school since 1990.The bird has been dead for a month.We have made lots of friends since we came here.,过去进行时,指在过去的某一个时间正在发生的动作。时间状语at this time yesterdayat five oclock yesterday afternoon动词由be动词+动词ing形式构成例句He was watching TV at this time yesterday.,过去将来时,指对过去的某一个时间来讲，将要发生的动作。动词由would+动词原型构成。例句He would go to the park the next day.He said he would work hard next term.,过去完成时,指对过去的某一个时间来讲，已经发生的动作。动词由had+过去分词构成。例句she had borrowed a book before she went to the park.We had learned many new words by the end of last term.,
