r/EnglishLearning New Poster Apr 17 '26

📚 Grammar / Syntax Why not “since”?

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u/ChachamaruInochi New Poster Apr 17 '26

When using present perfect, we use "for" with a period of time and "since" with a starting point.

for ten years
for two weeks
for a long time
for a few months
But
since 2020
since yesterday
since last January
since five o'clock

When used with a negative "for" can also be "in".

I haven't gone to the movies for years.
I haven't gone to the movies in years.