The distinction between the two voices, active and passive, is easy enough to make. The way you passify a verb is to start out with some form of the auxiliary to be and follow the auxiliary with the past participle of the verb.

This group includes various degrees of ineffectivity.

The third movie was undeniably the best.

I am subject to a tyrant, a sorcerer, that by his cunning hath cheated me of this island.