Time words and phrases help tell us about when something happened or is happening. You use some time words and phrases with the past simple and others with the present perfect.
Normally used with the past simple: when I was, last year, ago.
Normally used with the present perfect: ever, just, since.
Used with the past simple and the present perfect: always, never, for.
David changed his job last year.
Eli's just arrived.
Paul studied medicine for four years.
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