I bite the dog. (direct object = the dog) This sentence is active. The subject does the verb ( i.e. I bite)

To make this sentence passive, take the direct object and put it first in the sentence, Add a form of to be that is the same tense as the original sentence, and then add the perfect passive participle of the original verb. Finally, add the words by the followed by the original subject of the sentence.

The sentence He and I are done is not a passive sentence and can't go into the passive. Why? Because there is no direct object. It is like the sentence I am happy. I don't even think it is correct to call this sentence an active sentence, because active and passive only relate to sentences with transitive verbs (i.e. verbs that take a direct object).

This sentence is active unless you mean that "he and I are done <em>by something</em>", which would not make sense.

He and I is the subject of the sentence, and "are" is the verb. "Done" is an adjective that describes the state of being of "He and I."

Can you give more context to the sentence?

What is the situation?

It would be "He and I have been done"