行为动词一般现在时肯定句,疑问句,否定句的构成

肯定句用动词原形,如主语是单数第三人称,动词后加s/es,疑问句借助助动词Do,主语是单数第三人称Does,行为动词后的s/es去掉。否定句借助don't放在前面,如果是单数第三人称,借助doesn't,行为动词后s/es的去掉。He works in a factory。We work in a factory 。Does he work in a factory Do you work in a factory He doesn't work in a factory。We don't work in a factory 。