Englishfor English speakers
being
Noun
—
A being refers to a living thing.
You are a human being.
involved
Adjective
—
If X is involved (in Y), X does Y or is connected to Y
My teacher's very involved in politics.
—
If something is involved, it is complicated.
I can't explain it. It's all rather involved.
in
Preposition
—
Used to show that something is inside something else.
The cat is in the box.
—
Used to show that someone is at home, or is available.
Is John in?
The Doctor is now in.
—
Used to show movement towards the inside.
The rain came in through the window.