To be-глагол в настоящем,прошедшем и будущем времени.

Present simple ( i- am, we, you, they- are, it, he, she, -is) past simple ( i, it, she, he-was, you, we,they-were) future (they, we, you, she, he, it -will be)

to be- was\wee-been Пожалуйста