This presentation shows briefly the for and since use in present perfect. It has some visual examples for a better understanding. (all pictures from internet)

1. FOR and SINCE
MS. CRUZ

2. 1. Present Perfect (review)
a) They have moved into a new apartment.
b) Have you ever visited Mexico?
 The present perfect expresses that something happened (or never
 The exact time is not important and not mentioned.
happened) before now, at an unspecified time in the past.
(time?)
X
X
X X
X
X
 The present perfect also expresses the repetition of an activity before now.
c) We have had four tests so far this semester.
The exact time of each repetition is not important.

3. X X
 We use since to express the beginning of the period of time of an event.
 We use for to express the lenght (duration) of this event.
2. Since or For
SINCE
FOR

4. He has studied since two o’clock.
X X
SINCE

5. He has studied for two hours and fifteen minutes.
X X
FOR

6. X X
SINCE
He has been here since six o´clock.

7. He has been here for about two hours.
X X
FOR

8. He has had his cowboy doll
since he was a young kid.
He has had his cowboy doll for
more than eleven years.