think ahead
(先のことを)前もって考える≪to≫
think along similar lines
似た線に沿って考える
think big
((略式))でかいことを考える
think big
大きく考える
think carefully
よく考える
think deeply [(long and) hard]
深く[じっくり]考える
think it [things] over [out, through]
状況をよく考える
think money
金のことだけ考える
think on one's feet
即座に判断する[答える]
think originally
独創的に考える