... clause situation and the head clause situation. The Grammar of the English Verb PhraseVolume 1: The Grammar of the English Tense System≥12 1. IntroductionII. General linguistic terminology1.5 ... explain those concepts anddistinctions that underlie our description of the function of tense in English discourse. We provide definitions of basic linguistic terms such as verb phrase’or ‘situation’ ... would. These auxiliaries express special shades of meaning, such as volition, possibility, permission, necessity, intention, obliga-tion, expectation, inference, ability, determination, etc. The...