小学英语一般现在时ppt课件.ppt
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1、The simple present tense一般现在时,一般现在时表示经常发生的、习惯性的动作或存在的状态。与频率副词usually ,often, sometimes ,always和时间短语in the morning /afternoon/evening, at noon/night , every day/week/year/month 连用,其构成为:肯定句: 主语+动词(原形或第三人称单数)+其他。,I study English every morning.We speak Chinese.Jim likes playing football.,一般现在时,一般现在时表示经常
2、或习惯性的动作,也可表示现在的状态或主语具备的性格和能力等。,一般现在时(肯定句),在一般现在时中,句中有be动词或情态动词(can等)时,be动词要随主语而相应改变,情态动词不变。,例如,一般现在时(肯定句),1、I am a teacher. 2、He is a student. 3、You are a boy. 4、I can swim.,一般现在时(肯定句),没有be动词和情态动词,主语为第三人称单数的肯定句,动词要按规则加上s或es,主语是非第三人称单数的肯定句,动词用原形。,例如,哪些主语是第三人称单数?,一、人称代词he, she, it是第三人称单数。,He likes wat
3、ching TV. 他喜欢看电视。 She has lunch at twelve. 她十二点吃午餐。It looks like a cat. 它看起来像只猫。,二、单个人名、地名或称呼作主语;是第三人称单数。,Han Mei looks like her mother. 韩梅看起来像她的母亲Beijing is in China. 北京在中国。Uncle Wang often makes cakes. 王叔叔经常做蛋糕。,三、单数可数名词或this / that / the+单数可数名词作主语时,是第三人称单数。,A panda is a shy animal. 熊猫是害羞的动物。 This
4、 book is yellow. 这本书是黄色的。 That car is red. 那辆小汽车是红色的。 The cat is black. 这只猫是黑色的。,当主语是第三人称单数时,动词需变化.动词单三的变化:1、一般情况下,直接加s,如: reads, plays, works, makes2、以s, x, ch, sh结尾,后加es. 如:watches3、以辅音字母加o结尾,一般加es ,如:does, goes4、“元音字母+y”结尾的单词,直接在词尾加-s。 如:plays, says5、辅音字母+y结尾的单词, 去y,加ies, 如:worries, studies,一般现在时
5、(肯定句),1、I to school by bus. 2、He to school by bus. 3、She up at six.,go,goes,gets,一般现在时(否定句),在一般现在时中,句中有be动词或情态动词(can等)时,否定句在be动词和情态动词后加not。,例如,一般现在时(否定句),1、I am a teacher.否:I am not a teacher.2、He is a student.否: He is not a student.3、You are a boy.否: You are not a boy.4、I can swim.否: I can not(cant
6、) swim.,变否定句,I am a good boy.,I am not a good boy.,变否定句,He is at school.,He is not at school.,变否定句,They are students.,They are not students.,变否定句,She can speak English.,She can not speak English.,一般现在时(否定句),句中没有be动词或情态动词时,主语为第三人称单数的否定句在动词前加does not (doesnt),非单三时,否定句在动词前加do not(dont),例如,一般现在时(否定句),1、
7、I to school by bus. 否: I to school by bus. 2、He to school by bus. 否:He to school by bus.,go,dont go,goes,doesnt go,B. 否定句:主语+dont/ doesnt+动词原形+其他。I study English every morning.We speak Chinese.Jim likes playing football.,I dont study English every morning.,We dont speak Chinese.,Jim doesnt like play
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