Collocations for positive - adj.

be, seem, sound

absolutely, quite (esp. BrE)
I'm absolutely positive it was him.

fairly
almost (esp. AmE)

about
She seemed fairly positive about it.

of
Are you positive of your facts?

appear, be, feel, seem, sound
remain

extremely, fairly, very, etc.
highly, overwhelmingly
He took a highly positive view of the matter.

entirely, wholly
moderately (AmE)
generally
apparently

about
He sounded very positive about his chances.

be, prove, test
The test proved positive.

strongly, weakly (both technical)

for
He tested positive for HIV.

Positive is used with these nouns:
achievement, act, action, advantage, answer, approach, aspect, association, atmosphere, attitude, attribute, balance, benefit, change, comment, connotation, consequence, contribution, correlation, coverage, development, diagnosis, direction, discrimination, effect, effort, emotion, encouragement, energy, evaluation, evidence, expectation, experience, fashion, feedback, feeling, finding, force, idea, identification, image, imagery, impact, impression, improvement, incentive, indication, inducement, influence, manner, memory, message, mood, motivation, move, news, note, number, outcome, outlook, perception, proof, publicity, quality, reaction, reception, recognition, recommendation, reinforcement, relationship, reply, report, reputation, response, result, return, review, role, sense, side, side effect, sign, slant, slope, smear, spin, spin-off, stance, statement, step, stimulus, suggestion, test, thing, thinking, thought, trend, view, voltage