一般现在时
一般现在时： 一、一般现在时的功能1.表示事物或人物的特征、状态。如：The sky is blue.天空是蓝色的。 1.表示经常性或习惯性的动作。如：I get up at six every day.我每天六点起床。 2.表示客观现实。如：The earth goes around the sun.地球绕着太阳转。 二、一般现在时的构成1. be动词：主语+be(am,is,are)+其它。如：I am a boy.我是一个男孩。 2.行为动词：主语+行为动词(+其它)。如：We study English.我们学习英语。 【注意】当当主语为第三人称单数(he, she,it)时，要在动词后加"-s"或"-es"。如： Mary likes Chinese.玛丽喜欢汉语。注意：一般现在时经常和频率副词连用。Often, always , usually, sometimes, seldom, never 三、一般现在时的变化 1. be动词的变化。否定句：主语+ be + not +其它。如：He is not a worker.他不是工人。一般疑问句：Be +主语+其它。如：-Are you a student? -Yes. I am. / No, I'm not.特殊疑问句：疑问词+一般疑问句。如：Where is my bike? 2.行为动词的变化。否定句：主语+ don't( doesn't ) +动词原形(+其它)。如：I don't like bread.当主语为第三人称单数时，要用doesn't构成否定句。如：He doesn't often play.一般疑问句：Do( Does ) +主语+动词原形+其它。如：- Do you often play football? - Yes, I do. / No, I don't.当主语为第三人称单数时，要用does构成一般疑问句。如：- Does she go to work by bike? - Yes, she does. / No, she doesn't.特殊疑问句：疑问词+一般疑问句。如：How does your father go to work?3.动词+s的变化规则1．一般情况下，直接加-s，如：cook-cooks, milk-milks2．以s. x. sh. ch. o结尾，加-es，如：guess-guesses, wash-washes, watch-watches, go-goes3．以“辅音字母+y”结尾，变y为i, 再加-es，如：study-studies
在一般现在时中,当主语是第三人称单数时,谓语动词要用第三人称单数形式,即常在动词原形后加-s或-es.但有些同学们对于哪些主语是第三人称单数还不十分清楚,现归纳总结如下： 1、人称代词he,she,it是第三人称单数.如：He likes watching 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.(口诀：I用am,you用are,is用于她他它,单数名词用is,复数名词都用are) 2、单个人名、地名或称呼作主语；是第三人称单数.如：①Han Mei looks like her mother.韩梅看起来像她的母亲.②Beijing is in China.北京在中国.③Uncle Wang often makes cakes.王叔叔经常做蛋糕. 3、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.如：①A horse is a useful animal.马是有用的动物.②This book is yours.这本书是你的.4、不定代词someone,somebody,nobody,everything,something等及指示代词this,that作主语时,是第三人称单数.如：①Everyone is here.大家到齐了.②There is something wrong with the watch.这块手表有毛病. 5、不可数名词作主语时为第三人称单数.如：①The milk is in the glass.牛奶在玻璃杯里.②The bread is very small.那面包很小. 6、当数字或字母作主语时,看作第三人称单数.如：①"6" is a lucky number."6"是个吉利数字. 练习题一、用所给词的正确形式填空。1.What_____(do)Alice find? 2.Which toy_____(do) she like? 3.He doesn’t______(know)her name. 4.Where _____(do)Grandma live? 5.The boy_______(chase) it. 6.Grandma Wang___(live) in Shanghai.. 7.When ______(do)he get up? 8.Kitty______(watch)TV everyday. 9.John can’t_______(find) his watch.10.We often___________(play) in the playground.11.He _________(get) up at six o’clock.12.__________you _________(brush) your teeth every morning?13.What____________(do) he usually__________(do) after school?14.Danny _____________(study) English, Chinese, maths, science and Art at school.
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