Ground of the temporality of human experience must certainly come from an a- temporal structure. And the notion of time may arise with the appearance of emergent events in common experience. ..
Actually, the emergent event is an unexpected disruption of continuity, an inhibition of passage. I already demonstrate in Hypertextual that unexpected does not belong to time dimension. So the emergent event, which seems not to arise from our common temporality, establishes a barrier between past and future.
The initial temporal structure of human time - consciousness - lies in the separation of past, present and future; and this process is probably created by emergent events in our lives. The actor, blocked in his activity, confronts the unexpected in his present and looks to the future as the field of potential resolution of conflict. The future is a temporally, and frequently spatially, distant realm to be reached through intelligent action.
Human action is action-in-unexpected.