The bone was being chewed. I am sickened by sandwiches. Rhonda's head is being used as a bludgeon. The Stymphalian birds were scattered by the arrows of Heracles. So you can test a sentence for passiveness by recognizing or inserting a real or hypothetical agent .
Mood distinguishes verbs according to function.
Tense distinguishes verbs according to time. As this handout is being distributed, we are dealing only with the present active verbs.