Language/English/Grammar/Since-and-For
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Here is a quick article to help you make the difference between "Since" and "For".
Since and for both relate to when events happen.
Since
Rule
Use since + (a specific time) like May 12, or 10:11 a.m., or Monday, or "I was 20".
Since can only be used with the perfect tenses.
Examples
- I have known him since September.
- Amanda hasn’t been there since she was 20
For
Rule
Use for + (a length of time) like 1 hour, or 3 days, or 4 years.
For can be used with all tenses.
Examples
- I have known him for 2 months.
- Amanda hasn’t been there for 10 years.