Фрагмент из книги:
A ‘tense’ is a form of a verbal group that indicates either (1) the past time, (2) the present time, or (3) the future time. The verbal group always consists of (a) one main verb, often consists of (b) an auxiliary verb and (c) a participle or participles, and intermittently consists of (d) a modal verb. For the purpose of the visual aid, the past tense is highlighted in red and is represented by a red circle (i.e. ) the present tense is highlighted in yellow and is represented by a yellow circle (i.e. ) and the future tense is highlighted in greenand is represented by a green circle.








