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-milks 2.以s. x. sh. ch. o结尾,加-es,如:guess-guesses, wash-washes, watch-watches, go-goes 3.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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