Be-being-was/were-been.
Just like:
Eat-eating-ate-eaten.
Simple Future: He will be at home shortly.
Simple Past: He was at home.
He has been at home since yesterday.
Being inatumika sanasana kwenye passive voice.
Mfano: Juma is eating the mango.
The mango is being eaten by Juma.
mbali na ni nadra sana au si kawaida kutumia being katika active voice in present progressive tense kama main verb.
mfano:
"I am being a doctor" kama ilivyo kwa kitenzi "go" I am going home.