What are the past participle forms of verb be?

The verb "be" is an irregular verb, meaning it doesn't follow the standard -ed ending for past participles. Here are the past participle forms of "be":

* been - used for all tenses except the present perfect and past perfect

* being - used for the present participle and gerund

Here are some examples:

* I have been to the beach. (present perfect)

* She had been sleeping. (past perfect)

* The book is being read. (present participle)

* Running is being a good form of exercise. (gerund)