摘要：1．must表示有做某一动作的必要或义务.强调主观看法.可译为“必须.应该 . Everyone must obey the rule. 人人都必须遵守制度. We must do everything step by step. 我们必须逐步做每件事. Teachers must be patient enough with their students. 老师必须对学生有足够的耐心.

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