4.think of;think about;think over的用法与区别

4.think of;think about;think over的用法与区别
我查了语法书,但觉得书上介绍的think of 和think about的用法不是很明晰,麻烦介绍的详细一些

think of 考虑；关心；想起
think about 考虑；思考
think over 仔细考虑
这里有些我做家教的参考资料,你可以了解一下：
think about和think of这两个短语表示“考虑”、“对……有某种看法”时,可以互换.例如：
Don't think of（about）me any more．不要再考虑我.
They're thinking about（of）buying a new car．他们正在考虑买一辆新车.
What do you think of（about）the film?你认为那部影片怎么样?
think of表示下列意义时,一般不和think about换用：
①想要；打算.例如：
Helen,are you thinking of marrying Tom?海伦,你打算和汤姆结婚吗?
②想出；想到.例如：
Who thought of the idea?谁想出的这个主意?
③关心；想着.例如：
Lei Feng was always thinking of others．雷锋总是为别人着想.
④想起；记得.例如：
I can't think of his name．我想不起他的名字.
think about表示“回想过去的事情”、“考虑某计划是否切实可行”时,一般不和think of换用.例如：
I often thought about what you said．我常常想到你说过的话.
I'll think about your suggestion,and give you an answer tomorrow．我要考虑一下你的建议,明天给你答复.
think over意为“仔细考虑”.例如：
Think over,and you'll find a way．仔细考虑一下,你就会有办法的.
We need several days to think this matter over．我们需要几天的时间把这件事情仔细考虑一下.