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1、-一般现在时实义动词的变化规律口诀我们在学习一般现在时的句子中接触到了两种动词,一种是系动词be (am , is are )用法比较简单,另外一种是实义动词,也称作行为动词。在有实义动词的句子中,实义动词的形式经常会有变化,有时还出现不同的助动词,这些变化经常使大部分学生迷惑不解,感到无规律可循,经常弄错。经过多年的教学实践和深入的研究发现其中也有一定的奥秘,希望对广大的教师和莘莘学子们以帮助。为了方便同学门的学习和记忆,现将其以口诀的形式出现。实义动词现在时, 肯定句中两形式。主语单三动词变, 除此之外莫变换。否定疑问不麻烦, 助动词必须出现,主语单三does见 , 其余主语do 替换,否
2、定疑问动用原。 特殊情况总会变,主定提问动单三, 助动词不再露面。具体解释如下: 一、 动词发生变化。在一般现在时的肯定句中,若主语是第三人称单数,实义动词要发生变化,简称:肯定句,主单三,动词变。(特殊注意:若主语不是第三人称单数时,实义动词则不发生变化。)My mother often makes cakes for us They speak English every dayWe go to school by bike every day二、 要出现助动词。在一般现在时的否定句或疑问句中要出现助动词do或does。若主语是第三人称单数,助动词用does;若主语不是第三人称单数,助动词
3、用do。(特殊注意:1.在一般疑问句中,助动词要放在句首。2.在否定句中,助动词要放在主语的后面,实义动词的前面。3.一般疑问句的回答:肯定回答:Yes, 主语+句首的助动词;否定回答:No,主语+句首的助动词与not 的缩略形式。注意:在一般疑问句的回答时遵循这样的规律,即前面有Yes,后面无not, 前面有No,后面要有not。Do you love your school ?He doesnt go to school by bike We dont have classes on SundayDoes he like swimming ?三、 动词要用原形。在一般现在时的否定句或疑问句
4、子中,无论主语是第几人称,单数还是复数,实义动词都用原形。Han Mei doesnt like milk at allDoes he speak English ?They dont come from AmericaDo you have an eraser ? 特例:在对句子的主语或主语的定语进行提问时,句子中不出现助动词,谓语动词用第三人称单数形式。例如: Miss Zhang teaches us English.(对划线部分提问) Who teaches you English ?Who sits behind you ?的Li Lei does 重点语法相关练习:句型转换1. S
5、he often does her homework after supper .(改为一般疑问句)_ she often _ her homework after supper ?2. We have three meals a day . .(改为一般疑问句) _ you _three meals a day ?3. Jack studies English very hard .(改为否定句)Jack _ _ English very hard .4. Kate lives on a farm (就画线部分提问)_ _ kate _ ?5. They have lunch at scho
6、ol every day . (改为否定句)They _ _ lunch at school every day .6. Li lei sits behind me in our class . (就画线部分提问)_ _ behind me in our class ?7. I go to school by bike every day. (就画线部分提问)_ _ you _ to school every day ?Keys :1. Does , do 2. Do , have 3. doesnt , study 4. Where , does ,live 5. dont , have 6. Who , sits 7. How, do ,you -第 2 页-