时间不仅是一种物理现象和宇宙特征 ,而且还是一种语言现象。话语中的时间表达表现出程度不同的习语性。它们构成了指示话语时间性的习语资源。公共时间表达体现的是制度化的时间理解方式 ,个人时间表达体现出对时间的理解有时会因人而异。时间表达为话语的衔接与连贯做出贡献 ,其重要性因语篇体裁类型而有所不同。 Time is not only a physical phenomenon and a cosmic feature, but also a linguistic phenomenon. Time expressions in discourse show different degrees of idioms. They constitute a temporal idiographic resource that indicates discourse. Public time expression embodies institutionalized way of understanding time, personal time expression reflects the understanding of time sometimes varies from person to person. Time expression contributes to the cohesion and coherence of discourse, the importance of which varies depending on the genre of discourse.