think about表示经常思考、研究的意思。think over意为“仔细考虑”。think of与think about这两个短语表示下列意义时可以互换.1、考虑，例如Don't think of/about me any more.不要再考虑我；2、对……有某种看法，例如What do you think of/about the film你认为那部影片怎么样？

例句

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，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。