肯定句：主语+动词(be动词/情态动词/行为动词）+... 如：He has a son.(has 就是行为动词）否定句：主语+be动词/助动词/情态动词+not+动词原形+...(be 动词后不能加动词，应将动词改成动名词）如：He doesn't have a son.(does 就是助动词）一般疑问句：be动词/助动词/情态动词+主语+行为动词原形+... 如：Does he have a son?
肯定句：主语+动词(be动词/情态动词/行为动词）+... 如：He has a son.(has 就是行为动词）否定句：主语+be动词/助动词/情态动词+not+动词原形+...(be 动词后不能加动词，应将动词改成动名词）如：He doesn't have a son.(does 就是助动词）一般疑问句：be动词/助动词/情态动词+主语+行为动词原形+... 如：Does he have a son?
