think意思是“认为,觉得,想”的时候是及物动词
例：He thinks himself a great football player.他认为自己是个很棒的足球运动员.
I think you are beautiful.我觉得你很漂亮.
Mary thinks,"What a good idea it is!" 玛丽想,这个主意真棒!
think of 固定搭配,意思是“想起,思考”
例：I often think of my best friend when I see the photo.看到这张照片,我总是想起我的好朋友.
还有你这句 He slept there,thinking of his life.他躺在那,思考着他的人生.
常用搭配还有：
think about 考虑
think over 仔细考虑