be being been
Yes. It is.
No, "in" is a preposition - a word that shows position (like in, on, under, over, around, etc.). The "state of BEing" verbs are simply the 8 forms of "to be" - am, is, are, was, were, being, been,...
The word 'helped' is an action verb, the past participle, past tense of the verb to help.
no silly