Present Perfect + ‘for’ and ‘since’
Using the present perfect, we can define a period of time before now by considering its duration,with for + a period of time, or by considering its starting point, with since + a point in time.
For + a period of time
- for six years, for a week, for a month, for hours, for two hours.
- I have worked here for five years.
Since + a point in time
- since this morning, since last week, since yesterday,
- since I was a child, since Wednesday, since 2 o’clock.
- I have worked here since 1990.
present perfect with for
- She has lived here for twenty years.
- We have taught at this school for a long time.
- Alice has been married for three months.
- They have been at the hotel for a week.
present perfect with since
- She has lived here since 1980.
- We have taught at this school since 1965
- Alice has been married since March 2nd.
- They have been at the hotel since last Tuesday.
- For and since can both be used with the past perfect.
- Since can only be used with perfect tenses, for can also be used with the simple past.
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