be preparing for和be prepared for的区别

一个是主动

prepare + 双宾语（间接宾语和直接宾语）.例如：
Mother is preparing us a meal.= Mother is preparing a meal for us.
母亲正在为我们做饭.
一个是被动语态
过去分词 prepared 用于系表结构,意思为“为……做好准备；打算”,常用于以下句式：
1.be prepared + for （或 against ）引起的短语.例如：
They were prepared for the worst.
他们已准备好应付最坏的情况.
I knew there were problems,but I was not prepared for this.
我知道有些问题,但却未防范这一点!
The secretary has prepared the president a long report.= The secretary has prepared a long report for the president.

一个是主动
I am preparing the exam. 我在准备考试。
一个是被动语态
Extra money is prepared for Chinese Lunar New Year.多余的钱为中国新年而准备

主动和被动