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1、一般现在时之否法句一、系动词Be系列的否定句二、情态动词系列的否定句三、行为动词系列的否定句什么是否定句？对事物做出否定判断的句子就是否定句。一、系动词be系列的否定句的构成主语+be+not+其他is not=are not=isntarent1.Kitty (not)an English girl.2.We (not)students.3.I (not)from Taizhou.4.She (not)tall.5.Lucy and Lily （not）good friends.6.Those chairs (not)broken.7.The bag (not)mine.isntarenta
2、m notisntarentarentisnt二、情态动词系列的否定句的构成主语+情态动词+not+动词原形+其他can not =could not =must not =would not =will not =should not =may not =cantcouldntmustntwouldntwontshouldntmay notShe (can not)speak English.You (must not)open the door.They (should not)be right.I (will not)go to Japan.cantmustntshouldntwont三
3、、行为动词系列的否定句的构成主语+助动词（do/does）+not+行为动词原形+其他什么时候用助动词do，does呢？当行为动词是第三人称单数形式时，用助动词does。当行为动词是原形时，用助动词do。do not=does not=dontdoestThese boys do not like playing football.The girl does not read English every morning.2、The girl reads English every morning.1、These boys like playing football.一找 找行为动词二变 变助动
4、词（do、does）+行为动词原形三加 在助动词后面加not1.I like red.2.They like orange.3.We walk to school every day.I dont like red.They dont like orange.We dont walk to school every day.104.His brother plays football after school.5.It looks like a hat.、6.She has a cat at home.His brother doesnt play football.It doesnt look like a hat.She doesnt have a cat at home.11提示：1、如果句中出现some在改否定句时一定要将其变为any。2、如果句中出现and在改否定句时一定要将其变为or。3、如果句中出现too在改否定句时一定要将其变为either。