Think through(仔细考虑)>think up (想起)>think back(苦苦思索，回忆)
词形变化：
thinks、thought、thought
Think词*析：
1. to believe something or have an opinion or idea 相信;觉得;思考
[ + (that) ] I think (that) I've met you before.
我觉得以前见过你。
I don't think I will get the job.
我认为我不会获得这份工作。
"Do you think (that) you could get me some stamps while you're in town?"
你进城的时候可以帮我买些邮票吗?
2. to use the brain to decide to do something 思考，考虑(动脑筋决定做某事)
[ + of+ -ing verb ] I'm thinking of taking up running.
我在考虑去跑步。
[ + (that) ] I think (that) I'll go swimming after lunch.
我想午饭后去游泳。
I'm thinking about buying a new car.
我在考虑买辆新车。
3. to use the brain to plan something, solve a problem, understand a situation, etc. 考虑，想，思索
What are you thinking?
你在想什么呢?
He just does these things without thinking and he gets himself into trouble.
