be thinking of/about doing something
 can’t think straight
 don’t even think about/of doing something
 do you think...?
 I can’t hear myself think
 if someone thinks something, they have another think coming
 I thought as much
 I thought (that)
 I wasn’t thinking/I didn’t think
 I wouldn’t think of doing something/I would never think of doing something
 not be thinking straight
 not think for a minute/moment (that)
 not think much of
 that’s what you/they etc. think
 think badly/ill of someone
 think the best/worst of someone
 think better of something
 think for yourself
 think highly/a lot of someone
 think nothing of doing something
 think on your feet
 think out loud
 think outside the box
 think twice/again
 think the world of someone
 what/where/when do you think?
 what/who/where does someone think
 what was someone thinking of?
 who would have thought...?
 you would think/I’d have thought