1、肯定形式:主语+动词过去式+其他 例句:She went shopping with us last Sunday. 上周日她和我们去购物了。 2、否定形式:①was/were+not;②在行为动词前加didn't,同时还原行为动词 例句:He wasn't at home this morning. 他今天早上没在家。 I...