你认真想想..用英语怎么说

You should give it more thought.

直译:Think about it seriously!
黑人朋友:Think about it,man!
老师:You guys are supposed to think it over (before you do it)./You guys should think it over (before you do it).

You should think about it

中英不能直译的！！

You should think about it seriously.