四年级下英语语法讲解-一般将来时_pep

1、. 小学英语语法:一般如今时讲解一. 意义：表示经常发生的事情，动作或存在的状态二. 构成及变化1.be动词的变化。肯定句：主语+beam,is,are+其它。如：I am a boy.我是一个男孩。否认句：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。当主语为第一，二人称及复数时，助动词为do肯定句：主语+动词原形+其它。如

2、：We often play basketball after school.否认句：主语+ don't+动词原形+其它。如：we dont play basketball after school.一般疑问句：Do +主语+动词原形+其它?如： Do you often play basketball after school l? Yes, we do. / No, we don't.特殊疑问句：疑问词+以do开头的一般疑问句? 如： What do you often do after school ?当主语为第三人称单数时 ,助动词为does肯定句：主语+动词三单式+其

3、它。如： He swims well.否认句：主语+ doesnt+动词原形+其它。如：He doesnt swim well.一般疑问句：Does +主语+动词原形+其它。如：Does he swim well ? Yes, he does. / No, he doesn't.特殊疑问句：疑问词+以does开头的一般疑问句?如： How does your father go to work?三.第三人称单数的动词变化规那么只有在第三人称为主语的肯定句中，动词才用三单式1多数动词直接加s:runs gets likes collets takes plays climbs.2结尾是s

4、, x, sh, ch, o,前为辅音字母,结尾加es :watches teaches goes does washes crosses mixes brushes3动词末尾y前为辅音:将y改为i加es: studystudies flyflies carrycarries crycries但在y前假如为元音那么直接加s:buys says四.时间标志：always , usually , often , sometimes ,every 如今进展时一.意义当表示如今正在进展的动作或正在发生的事。二.构成:be am, is ,are +动词如今分词-ing形式肯定句： 主语 + be + 如今分词V-ing + 其他 Im doing my homework now .否认句：主语+be+not+动词-ing +其他. Im not doing my homework now.一般疑问句：Be+主语+动词-ing +其他?Are you doing your home work now? Yes, I am