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2. 特殊结构的被动形式 (1) 双宾动词的被动结构 双宾动词变为被动结构时, 一般将主动结构中的间接宾语变为被动结构中的主语, 直接宾语不变。如将主动结构中的直接宾语变为被动结构中的主语, 间接宾语之前则应加介词to或for。 (2) 带复合宾语的动词的被动结构 带复合宾语的动词变被动语态时, 一般将主动结构中的宾语变为被动结构中的主语, 而将宾语补足语保留不动(这时的宾语补足语为主语补足语)。 (3) 带情态动词的被动语态，由“情态动词 +be +及物动词的过去分词”构成。 e.g. The problem may be solved in a number of different ways. In our school, library books must be returned in two weeks. (4)“be＋过去分词＋不定式”式的被动结构 e.g. He is reported to have broken a world record. She is said to know three languages. (5) “it＋be＋过去分词＋从句”式的被动结构 e.g. It’s said that she has some supernatural powers. It’s reported that they have discovered a new star. 常见的结构还有： It is known that...众所周知 It is suggested that...有人建议 It is believed that...人们相信 (6) “get＋done”构成被动语态 此种形式用来表示状态或情况, 常考的形式如下： get married | 
