英语语法之肯定句变否定句.doc

英语语法之肯定句变否定句 一、肯定句变否定句口诀 给句子分析它，看它结构是哪个 主加be后加not 其他一切全照抄 主加动词主重要 dont doesnt 来帮忙 dont doesnt 中间夹 doesnt doesnt 最特殊第三人称单数全靠它 二、简单句的句子结构 主语+be+其他 主语+动词+其他 备注：其中be里包括（am is are） 判断下列各句是主语加be还是主语加动词 I am a girl. I like singing. We go to school every day. They are good friends. He works hard. She likes playing with toys. My mother watches TV every day. You are a beautiful girl. Tom is playing football on the playground. Bill does his homework after supper. 三、肯定句变否定句规则 肯定句 主语+be+其他 变成 主语+be+not+其他 主语+动词+其他 变成 主语+dont+动词+其他 主语（第三人称单数）+动词单三+其他 变成 主语（第三人称单数）+doesnt +动词原形+其他 练习 She is watching TV now. We go to school on Sunday. His father works hard. Jacks mother is a nurse. The cat runs fast. They like reading books. My grandpa gives me a hot dog. Tom often walks to school. I have a doll. It is eating fish.