过去进行时肯定句、否定句和疑问句的结构 肯定句:主语+was / were + 动词的过去式 + 其他 例句:He was playing basketball yesterday. 否定句:主语+was / were + not + 动词的过去式 + 其他 例句:He was not playing basketball yesterday. 疑问句:Was/Were + 主语 + 动词的过去式 + 其他? 例句:Was ...