牛津中小学英语网

 找回密码
 注册

QQ登录

只需一步,快速开始

一般现在时

23时光 发表在 知识梳理2016-6-7 14:41 [复制链接]
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""-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yi, 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-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:Iam,youare,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:
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.
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:
A horse is a useful animal.马是有用的动物.
This 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:
Everyone is here.大家到齐了.
There 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:
The milk is in the glass.牛奶在玻璃杯里.
The 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:
"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 doesnt______(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 cant_______(find) his watch.
10.We often___________(play) in the playground.
11.He _________(get) up at six oclock.
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.


最新评论 | 正序浏览
您需要登录后才可以回帖 登录 | 注册

快速回复 返回顶部 返回列表