. Notes (b): I'm including Reichenbach's explanation or formulation of tenses in terms of three times: .Table Time Meaning .Row S When the statement is Spoken .Row R The time the speaker is Refering to .Row E The time of the Event. .Row E1 The start of extended event E. .Row E2 The end of extended event E. .Row = The two times are equal .Row < One time is before the other. .Close.Table So for example: `R=E