问句要根据陈述部分谓语的情况用“didn't+主语”或“wasn't/weren't+主语”;如果强调动作的完成(一般没有明确的过去时间状语),问句要用“haven't/hasn't+主语”. She must have read the novel last week,didn't she? 她上星期一定读了这本小说,是吗? You must have told her about it,haven't you? 你一定把这事告诉她了,是吗? 再问: 那些属于明确的过去时间状语状语呢? 再答: last night, yesterday, last year, 1998, 等等