Since and For
The words “since” and “for” are very often confused or used incorrectly. They are frequently used with the present perfect tense to express some time relationship.
For example: I have lived in Costa Rica since 2004. OR I have lived in Costa Rica for 9 years.
As you can see in the examples above, we use “since” with points of time (2004, last month, July, etc.) and we use “for” with periods of time (9 years, 2 months, 3 days, 2 minutes, etc.).
It’s a pretty easy distinction, but it can be hard to get right in practice. Check out the online quizzes below to practice, practice, practice until it feels like second nature to you!