Rule 1. Identify the (S+V+O) Subject, Verb and object in the active sentence to convert to passive voice...

Collective noun for cards – Deck/PackCollective noun for cigarettes – PacketCollective noun for mountains...

1. If the verb ends with ‘o’, es is added at the end of the verb.Example: go becomes goes, do becomes...

Collective noun for actors – Troupe, Company or CastCollective noun for soldiers – ArmyCollective...

Collective noun for bees – SwarmCollective noun for fish – Shoal or SchoolCollective noun for sheep...