be careful of和be careful with的区别
be careful of … 注意,小心 后接名词,动名词或从句。Be careful of强调对...认真,细心,小心。（比较褒义）be careful with … 小心 后接做的事情 。Be careful with强调的是对干什么要认真,谨慎。 例句：You must be careful with that vase,it is ver fragile. 你要小心对待那个花瓶,因为它很易碎 。
具体分析：
一、be careful of … 注意,小心 后接名词,动名词或从句。Be careful of强调对...认真,细心,小心。（比较褒义）
例句：
You are very careful of your work.对的工作很谨慎/认真。
It is really careful of you. 很认真（褒义） -------
二、be careful with … 小心 后接做的事情 。Be careful with强调的是对干什么要认真,谨慎。 例句：You must be careful with that vase,it is ver fragile. 你要小心对待那个花瓶,因为它很易碎 。
三、举个例子区别一下：
Please be careful of your spelling. 请注意拼写。（比较褒义）
Be careful with the wet floor. 小心潮湿的地板。（没有褒义，强调的是对干什么要认真）