
Ago
Relative to Present
Used when referencing time relative to the present, pointing backwards to a specific time.

He left the country a year ago.
Past Events
Typically refers to past events, cannot be used for future or ongoing events.

She graduated four years ago.
Specific Timeframe
Always specify the time period when using 'ago', like minutes, days, or years.

The message arrived five minutes ago.
Compare with
BeforeEarlyFormerHithertoOncePreviousYesteryear
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