What is the past participle of bite and what its tense?

The past participle of "bite" is bitten. It is used in the perfect tenses, which include:

* Present Perfect: I have bitten the apple.

* Past Perfect: I had bitten the apple before you arrived.

* Future Perfect: I will have bitten the apple by the time you get here.

The past participle can also be used in the passive voice:

* The apple was bitten by me.

Let me know if you'd like to know more about these tenses!