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小学英语基础知识汇总
2016-5-12 19:38:26      浏览次数:
[导读]: 一般现在时基本用法介绍 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。  2.表示经常性或习惯性的动作。如:I get up a

一般现在时基本用法介绍 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。

  2.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。

  3.表示客观现实。如:The earth goes around the sun.地球绕着太阳转。

  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。

  注意:(我用am,你用are,三单is,复数are。)

  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。)

  一般现在时的变化:

  1. be动词的变化。

  肯定句:主语+be+其它

  He is a worker. 他是工人。

  否定句:主语+ be + not +其它。

  He is not a worker.他不是工人。

  一般疑问句:Be +主语+其它。

  (be动词移到句首)

  如:I am a student.

  -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:My bike is under the tree.

  Is your bike under the tree?

  Where is your bike?

  

  2.行为动词的变化。

  肯定句:主语+动词原形(+其它)。

  否定句:主语+ don't( doesn't ) +动词原形(+其它)。

  如:I like bread. 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 ofter plays football.

  He doesn't often play football.

  一般疑问句:Do( Does ) +主语+动词原形+其它。(句首加助动词do, does)

  如:I often play football.

  - 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:She goes to school by bike.

  - Does she go to school by bike?

  - Yes, she does. / No, she doesn't.

  特殊疑问句:疑问词+一般疑问句。

  如:She goes to school by bike.

  Does she go to school by bike?

  How does she go to school?

  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

  现在进行时

  1.现在进行时表示现在正在进行或发生的动作,也可表示当前一段时间内的活动或现阶段正在进行的动作。(句中一般含有now, look, listen.)

  2.现在进行时的肯定句基本结构为be+动词ing.

  如:Tom is reading books in his study .

  3.现在进行时的否定句在be后加not。

  如:Tom is reading books in his study .

  Tom is not reading books in his study .

  4.现在进行时的一般疑问句把be动词调到句首。

  如:Tom is reading books in his study .

  Is Tom reading books in his study ?

  5.现在进行时的特殊疑问的基本结构为:疑问词+一般疑问句?

  (注意:当划线部分包含谓语动词时,用疑问词代替划线部分放到句首,原划线处应加上doing)

  如:Tom is reading books in his study .

  Tom is reading books in his study .

  Is Tom reading books in his study ?

  Is Tom reading books in his study ?

  What is Tom doing in his study?

  Where is Tom reading books?

  动词加ing的变化规则

  1.一般情况下,直接加ing,如:cook-cooking

  2.以不发音的e结尾,去e加ing,如:make-making, taste-tasting

  3.如果末尾是辅音字母加一个元音字母和一个辅音字母,双写末尾的辅音字母,再加ing,如:run-running, stop-stopping


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