Abstract: Based on the theory of fuzzy sets, an expansion of Allen's fuzzy temporal interval model for tempoal interval is derived, and the fuzzy relation between temporal intervals is discussed in view of classical tense relations. Then, a concept of time point in fuzzy temporal sequence is proposed with a fuzzy definition given to the tense relation attributes. In addition, the boundary relations of fuzzy temporal intervals are defined with fuzzy temporal sequence. Combining the sequence with the measure formula of temporal sequence, an accurate expression is given qualitatively to 13 fuzzy tenses, which can express both the precise and imprecise relationship of fuzzy events, and provide a theoretical basis for fuzzy reasoning.