What are all forms of the words 'to be'?

Question

For example, the words are and is are forms of the word to be? Anyone have more suggestions?

Only someone taking an English class would know what I'm talking about. My teacher doesn't want us using words like 'are' and 'is' or 'was' because they aren't active verbs. So my question is, does anyone know words that aren't active verbs?

Answer 1

am/is/are ------- present form
was/were -------- past form
been ------- past participle form

Ex: I am
he is/ she is/it is
you are/they are

I was/ he was/ she was/ it was
we were/you were/they were

I/we/you/they have been
he/she/it has been

Answer 2

Present Tense-is, am, are.
Past Tense-was, were
Past Participle-been
Examples
He is a student.
I am a student.
You are a student.
She was a student.
We were students.
He had been a student before his marriage.
Hope it helps.

Answer 3

I am
you are
he, she, it is
we are
you are
they are

and so on thru all of the tenses