We use FOR to describe the duration of the action
that started in the past and continues into the present.
-
for 5 minutes
-
for 8 hours
-
for 2 days
-
for 4 weeks
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for 6 months
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for a few years
-
for a decade
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for a long time
-
for long
-
for ages
-
for the last two weeks
-
for more than an hour
We use SINCE to tell when the action started.
-
since 8 o'clock
-
since yesterday
-
since Monday
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since last week
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since August
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since Christmas
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since 2014
-
since I was 7 (years old)
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since my birthday (party)
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since I started learning English
-
since she became a vegetarian
E.g.
Lisa has worked here for 7 years.
David has worked here since 2020.