......is prepared for....

請教一下 為什麼 ... is prepared for ... 要用被動式呢? 還是這裡的 prepared 是形容詞用法, 就如 ... is ready for ... 的用法一樣.
例如:
I was prepared for studying hard. 和 I prepared for studying hard. 這兩句有何不同呢?
還有請有(知識)的大大解答.
2 個解答 2