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在高中英语课本第一册第138页有一句:Her father thought that shemust have met a fairy.文后注释讲到了情态动词 must 的推测性用法。情态动词的这种推测性用法在课本中不时出现,为了使学生对此用法作一较系统掌握,我作了以下规纳和说明。英语中表示推测的情态动词较多,表示说话人主观认为或推测句子主语可能发生的动作或存在的状态等。能作推测用法的情态动词有以下九个:might,may,could,can 语气不肯定、表示可能;should,ought,would 语气较肯定、表示很可能;will,must 表示肯定语气即“一定”。其
In the first high school English textbook on the first page of the 138th one: Her father thought that shemust have met a fairy. The post-note refers to the speculative verb must be speculative usage. This speculative usage of modal verbs appears from time to time in textbooks. In order to give students a more systematic grasp of this usage, I made the following conformances and explanations. In English, there are many speculative verbs, suggesting that the speaker thinks or presumes the possible action or state of existence of the sentence subject. Modal verbs that can be used for speculation have the following nine: might, may, could, can tone is not sure, that possible; should, ought, would mood is more positive, that is likely; will, must say the affirmative tone that “must ”. its