I've read in BBC that we use use "being" as a verb-ing. BBC has listed two kinds of usage. What I want to learn here is about the "preposition+verb-ing" form of usage. It has been said that "being+past particle" here is functioning as a noun. But I don't know what kind of meanings it would convey. So, the following are two examples from BBC:
I look forward to being interviewed on the current affairs programme. (What does "being interviewed" mean?)
She was afraid of being accused of a crime which she did not commit. (Does it mean: She was afraid of that she was accused of a crime,...)
I think the following are also the examples of "preposition+verb-ing":
John talks about being helped by a stranger. (Does it mean: john talks about that he was helped by a stranger.)
Before being moved to an apartment, he lived in a hostel. (Does it mean: "Before he was moved to...")
Despite being helped by nurse, he slipped and fell. (Does it mean: despite he was helped by nurse ,...)
What is the risk of being killed in war? (Does it mean: what is the risk of killing in a war?)
What are the chances of being killed by a falling tree? (Does it mean: what are the chances of killing in a war?) Share your experiences of being helped by a teacher.
(Does it mean: share your experiences when you were helped by a stranger?)
Please explain to me the meaning and usage of "being+past particle" when we use it with a "preposition".