ABSTRACT
1.1. It is important to keep the two concepts time and tense strictly apart (see PG ch. XIX and XX). The former is common to all mankind and is independent of language; the latter varies from language to language and is the linguistic expression of time-relations, so far as these are indicated in verb forms; but in English as well as in many other languages such forms serve not only for time-relations, but also for other purposes, and very often they are inextricably confused with marks for person, mood, etc.
