he must have done it yesteraday,――?he must have done it for
1个回答
He must have done it yesteraday,―didn't he―?
He must have done it for 2 years,―hasn't he―?
He must have been here yesterday,―didn't he―?
He must have been here for 2 years,―hasn't he―?
语法分析：
句子含表示推测的 must have done,反意疑问句的形式视具体情况而定.
有 already,for two days 等完成时的时间状语时,反意疑问句的助动词用 haven’t；
有last night,yesterday 等明确的过去时间状语时,用 didn’t；
如果两类时间状语都没有,用 haven’t 或 didn’t 都可以.
【刚才有误,不是haven't,而是hasn't.】
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