In the present perfect tense, “since” and “for” are used to indicate time, but their specific usage is different:
“Since”: Used to indicate a specific point in time, referring to when an action or event began.
Example: I have lived here since 2010.
“For”: Used to indicate a duration of time, referring to how long something has lasted.
Example: She has worked here for five years.
In summary, “since” is used for a starting point in time, while “for” is used to talk about a period of time.