基本被动语态的格式是:be动词+及物动词的过去分词,但是“be+及物动词的过去分词”结构不一定都是被动语态,有些动词(如 be,feel,look,seem等)后面的过去分词已转化为形容词,用作表语表示状态。My father gave me an MP4 as a present。被动语态:An MP4 was given to me (by my father)as a present.I was given an MP4 as a present by my father.An MP4是主动语态的宾语,改被动语态要变成主语;介词要用by。