英语时态不单纯是表示时间观念的语法现象，还具有表达各种情感的特殊功能。
English tenses not only simply express the sense of time , but also have special function of expressing variety of feelings .
不确定时间常常表现出模糊性，该文用模糊集的方法研究不确定时间点、不确定时间区间的表示方法及其时态关系。
Uncertain time usually is fuzzy, this paper studies uncertain time order, expression method of uncertain time interval and tense relation by way of the fuzzy set.
时态是用来表示某一动作或状态发生和存在的时间的。
Tense is used to denote an action or the state of existence and the time.
时态是用来表示某一动作或状态发生和存在的时间的。
Tense is used to denote an action or the state of existence and the time.
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