7.My uncle is a policeman.He has towear uniforms to work.

分析 我的叔叔是一名警察,他必須穿制服上班.

解答 答案:wear.has to 是have to的三單形式,表示不得不…,后加動詞原形,結合句意我的叔叔是一名警察,可知是要穿制服上班,wear uniforms穿制服,wear表示"穿",故答案是wear.

點評 have to表示客觀需要做的事情,意思是"必須"、"不得不".后跟動詞原形,有人稱、時態(tài)和數(shù)的變化,與情態(tài)動詞 must 近義.have to 比較強調客觀需要,而 must 著重說明主觀看法.

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