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For & Since with Present Perfect Tense
We often use for and since with the present perfect tense.
- We use for to talk about a period of time - 5 minutes, 2 weeks, 6 years.
- We use since to talk about a point in past time - 9 o'clock, 1st January, Monday.
| for |
since |
| a period of time |
a point in past time |
|
x------------ |
| 20 minutes |
6.15pm |
| three days |
Monday |
| 6 months |
January |
| 4 years |
1994 |
| 2 centuries |
1800 |
| a long time |
I left school |
| ever |
the beginning of time |
| etc |
etc |
Here are some examples:
- I have been here for 20 minutes.
- I have been here since 9 o'clock.
- John hasn't called for 6 months.
- John hasn't called since February.
- He has worked in New York for a long time.
- He has worked in New York since he left school.
For can be used with all tenses. Since is usually used with perfect tenses only.
Now check your understanding »
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