Since and For. #6

Since + Punto determinado en el tiempo.
Since my birthday
Since this morning
Since last August
Since Chistmas

Example:

•  They haven´t had holidays since last summer.
•  Maya has lived in the USA since 2001
•  I have worked here since May.
•  I haven´t been home since yesterday.

For + Periodo de tiempo.
For a week
For two years
For ten minutes
For a long time

Example:
He has lived there for a year.
Have you been here for ten minutes?
I´ve lived in London for 3 years.
I have studied for three days.
I waited for 10 minutes.