think over和think about的区别：含义不同、用法不同。think over中文意思为仔细考虑、认真思考，后接名词或代词作宾语；think about意为思考、探讨、为…费心思，后面可接名词、动名词或者由疑问词引导的不定式。
例句：I must think over this. I have known for years that it was in the cards.
I suggest you think over your position very carefully.
Think over the matter and then make a decision.
He'd like more time to think things over.
You need space to think everything over
Think it over and let me know whether you agree with me.
例句：I'll think about it nearer the time.
This is a big issue; we need more time to think about it.
It was a difficult situation, when you think about it.
People just don't stop to think about the consequences.
If you think about it, those children must be at school by now.