noun
the time before the present
Examples:
- We should learn from the past.
- In the past, things were different.
- The past cannot be changed.
adjective
gone by in time; no longer current
Examples:
- The past week has been very busy.
- She is a past president of the club.
- Those are past events.
preposition
beyond in time; later than
Examples:
- It's past midnight.
- The deadline is past.
- We walked past the store.