Present Tense:
* am (I am)
* are (you are, we are, they are)
* is (he/she/it is)
Past Tense:
* was (I was, he/she/it was)
* were (you were, we were, they were)
Present Participle:
* being
Past Participle:
* been
Let me know if you'd like examples of how these forms are used in sentences!