Comrie's (1985) theory of tense

Absolute and relative tense
According to Comrie (1985), absolute tenses take the present moment as a deictic center, i.e. the time of utterance. The three absolute tenses are 'present', 'past' and 'future'. Relative tenses are defined relative to an additional reference point which does not (necessarily) correspond with the moment of utterance (Comrie 1985:122f). In absolute-relative tenses, the "reference point is established relative to the present moment, and a situation is located in time relative to that reference point" (Comrie 1985:125).

Representation of temporal reference
Comrie adopts Reichenbach’s (1947) primitives 'S' (time of speech), 'E' (time of event) and 'R' (reference point). Unlike Reichenbach, he uses three ordering relations: ‘simul’, ‘before’ and ‘after’ (Comrie 1985:122). Absolute tenses express a relation between S and E. The reference point R only plays a role in the expression of absolute-relative tenses.

Tenses express two types of temporal relations: (i) between R and S, and (ii) between R and E. It is important to note that the relative position of E and S is not specified (Comrie 1985: 125).

A distinction between the English Simple Past and the Present Perfect is not made, so "[i]n terms of location in time, [...] the perfect is not distinct from the past" (Comrie 1985: 78).

Literature

 * Comrie, Bernard (1985). Tense. Cambridge: CUP.