must 作为情态动词的用法问题?试比较以下的句子有何不同:句一:He must have been in his office last night.句二:You must hand in the report immediately.
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![must 作为情态动词的用法问题?试比较以下的句子有何不同:句一:He must have been in his office last night.句二:You must hand in the report immediately.](/uploads/image/z/2894798-38-8.jpg?t=must+%E4%BD%9C%E4%B8%BA%E6%83%85%E6%80%81%E5%8A%A8%E8%AF%8D%E7%9A%84%E7%94%A8%E6%B3%95%E9%97%AE%E9%A2%98%3F%E8%AF%95%E6%AF%94%E8%BE%83%E4%BB%A5%E4%B8%8B%E7%9A%84%E5%8F%A5%E5%AD%90%E6%9C%89%E4%BD%95%E4%B8%8D%E5%90%8C%3A%E5%8F%A5%E4%B8%80%3AHe+must+have+been+in+his+office+last+night.%E5%8F%A5%E4%BA%8C%3AYou+must+hand+in+the+report+immediately.)
must 作为情态动词的用法问题?试比较以下的句子有何不同:句一:He must have been in his office last night.句二:You must hand in the report immediately.
must 作为情态动词的用法问题?
试比较以下的句子有何不同:
句一:
He must have been in his office last night.
句二:
You must hand in the report immediately.
must 作为情态动词的用法问题?试比较以下的句子有何不同:句一:He must have been in his office last night.句二:You must hand in the report immediately.
你列举的这两组句子中的must就是其做情态动词的用法,但是它们之间有所不同.
试分析如下:
第一句中的must 除了表示主观意愿的"必须"以外,还可以表示"推测",语气十分肯定.而第二句中的"must"则表示"必须",含有命令的意味,是情态动词的一种用法,除了"must"以外,其它情态动词can/could,may/might等都有类似的用法
He must have been in his office last night.
他昨夜一定去过办公室. (肯定句) must表示一定
You must hand in the report immediately.
你必须马上上交汇报. (祈使句) must表示必须
第一句表示猜测翻译“一定”,这里是对过去情况的判断,不做情态动词用,有虚拟语气。
第二句是情态动词,翻译成“必须”,这里表示将来
must do sth 1句是表肯定,2句表命令