Collocations for passive - adj.

be, seem
become
remain

extremely, fairly, very, etc.
completely, totally
TV is a completely passive activity.

merely, purely
It is often assumed that the learner is merely passive.

relatively
essentially
The heroine plays an essentially passive role in the drama.

Passive is used with these nouns:
acceptance, construction, consumer, euthanasia, infinitive, learning, obedience, observer, participant, recipient, resistance, role, smoker, smoking, spectator, verb, victim, vocabulary