VERBS

be, seem, sound

ADV

absolutely, quite
I'm absolutely positive it was him
fairly

PREP

about
She seemed fairly positive about it
of
Are you positive of your facts?

VERBS

appear, be, feel, seem, sound
remain

ADV

distinctly, extremely, highly, overwhelmingly, really, very
He took a highly positive view of the matter
entirely, wholly
fairly, mildly, moderately, quite
broadly, essentially, generally
apparently, seemingly

PREP

about
sounding very positive about his chances

VERBS

be, prove, test
The test proved positive

ADV

strongly, weakly (both technical)

PREP

for
He tested positive for HIV