Since and For

 For

For+Period-a "period" is a duration  of time.

For two weeks,for five minutes,for 6 years

  • They study for two hours everyday.
  • He worked at that bank for 5 years.

Since 

Since+Point-a "point" is a precise moment in time- 9 o'clock,1 st january.

  • He has been here since 9 am.
  • He has been studying since 7am.


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