Prototypical prepositions are [p en/from] and [p en/since] (but see note under [ss Time] about the ambiguity of [p en/since]):

- [ex 001 "The show will run [p en/from StartTime] 10 a.m. to 2 p.m."]

- [ex 002 "a document dating [p en/from StartTime] the thirteenth century"]

Note that simple [ss Time] is used with verbs like <i>start</i> and <i>begin</i>: the event directly described by the PP is the starting, not the thing that started.

- [ex 003 "The show will start [p en/at Time] 10 a.m. ([ss Time])"]