I’ve been studying English since I was first grade in middle school.
I’ve been thinking about quitting my job since I was in this company at first.
We’ve been fishing for three hours.
He’s been waiting for his boss for two weeks so as to get paid for a delayed salary.
She’s been putting up the makeup for two hours.

I’ve been studying English since I was first grade in middle school.
I’ve been thinking about quitting my job.
We’ve been fishing for three hours.
He’s been waiting for his boss for two weeks so that he can get his salary.
She’s been putting up her makeup for two hours.