ADV

really
personally
I personally think it's all been a lot of fuss over nothing
honestly
Did you honestly think I would agree to that?
never
I never thought you would carry out your threat

VERB + THINK

be inclined to
I'm inclined to think we've been a little harsh on her

PREP

about
I still don't know what he really thinks about it
of
What did you think of the film?

ADV

suddenly

PREP

of
I suddenly thought of a way I could help

ADV

carefully, deeply, (long and) hard
She thought long and hard before accepting his offer
fleetingly
rationally
He seemed to have lost the ability to think rationally
frantically
What can I do now? he thought frantically
contemptuously, despairingly, dully, glumly, grimly, guiltily, indignantly, irritably, miserably, resentfully
ruefully, wistfully, wryly

VERB + THINK

dread to, hate to, shudder to, tremble to
I hate to think what would have happened if we hadn't arrived

PREP

about
Think about what you are going to do next
of
I often think of Jane