Perbedaan kata Since dan For

Since and For

* Since (Sejak)

          Digunakan kalau bertemu dengan kata : " last, ago, o'clock, yesterday, year, month, day. "

          Ex:  - I have studied English since 1996.

                  - Jimmy has swum since 10 o'clock. 

* For (Selama)

          Digunakan kalau tidak ada kata-kata diatas. ( last, ago, o'clock, yesterday, year, month, day.)

          Ex:  - We have studied English for ten minutes.

                  - I haven't met him for three months.