I’ve been studying really hard _____ the exam was announced
Since
She’s been in this school _____ 6 years
For
They’ve been friends _____ last year
Since
Jake hasn’t showered _____ a month, please do something about it
For
We have been listening to that song _____ it came out
Since
He has lived in Bogota _____ a long time.
For
She has played softball _____ she was 5 years old
Since
I've been taking piano lessons _____ three months
For
They've been really bussy _____ friday
Since
My sister has worked in Buenos Aires _____ last year.
since
