This continues the post on the Arrow of tense.
Past, present, and future are characteristics of time. But they are also characteristics of places, of things, or events, etc.
Yesterday was in the past, today is in the present, and tomorrow is in the future.
Past places are remembered, present places are experienced, and future places are imagined.
Some things were in the past, some things are in the present, and some things will be in the future.
Some events happened in the past, some events are happening in the present, and some events will be happening in the future.
So past, present, and future are not time itself. They are characteristics that apply to various things.
Past, present, and future are tenses, which refer to order, not time per se. One can order events, experiences, objects, places, and periods of time in various ways. One can study which order is the right physical order.
And time has order. But order is not time.
Time is duration.