1 prepare sb / oneself for sth -------是及物动词,主动语态。
Let's prepare him for the journey
2 prepare for sth ------不及物动词。
The whole class is working hard preparing for the coming exams
3 be prepared to do /for sth.是prepare sb / oneself for sth 的被动语态结构
I am sure the police are prepared for trouble in this sense.
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