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For and Since with Present Perfect Continuous Tense

We often use for and since with perfect tenses:

for since
a period of time a point in past time
- - - - - - - - - - - - - • - - - - - - - - - -
30 minutes 10.00am
four days Friday
3 months March
2 years 2010
3 centuries 1700
ages I left school
ever the beginning of time
etc etc

Look at these example sentences using for and since with the Present Perfect Continuous tense:

For can be used with all tenses. Since is usually used with perfect tenses only.