What story is it, I'll answer when I know the story title.
Answer and Explanation:
My story took place one day in my childhood, when only my younger brother and I were at home. My parents needed to leave the house for a few hours and we were left alone, however my brother who was a much younger child than me started exploring the house. He climbed onto a chair and began to fiddle with broken glass that was on top of my backyard wall. I didn't see what he was doing until I heard a very loud scream. I ran out into the yard and could see my brother with a bloody hand and broken glass stuck in it. I was also a kid at the time and I was very scared, but I had to help him by pulling the broken glass out of his hand and trying to stop the bleeding. Although everything worked out in the end, but that was a very scary experience that I witnessed.
"Had been cleaning" is in the past perfect progressive tense.
The past perfect progressive tense indicates a continuous action that was completed sometime in the past.
SUBJECT + HAD + BEEN + PRESENT PARTICIPLE
Answer:
The goal was to investigate how people would conform to the roles of guard and prisoner in a role-playing exercise that simulated prison life.
