双宾语如何变被动语态?

含有双宾语的动词在变为被动语态时,有以下三种情形：
一、有些双宾动词(如award,buy,give,leave,lend,offer,pay,show,teach,tell等)在变为被动语态时,既可把间接宾语(指人)变为被动语态的主语,而把直接宾语(指事物)保留下来(称为保留宾语),也可把直接宾语(指事物)变为被动语态的主语,而把间接宾语改为介词to 或for引起的状语(到底用to还是for,与所搭配的动词有关).比较：
He gave her some money.他给她一些钱.
→ She was given some money.
→Some money was given to him.
He bought her a watch.他给她买了一快表.
→ A watch was bought for her.
→She was bought a watch.
二、有些双宾动词(如bring,do,make,pass,sell,send,sing,write等)通常用直接宾语(指事物)作被动语态的主语,而将间接宾语用作保留宾语(其前根据情况用介词to或for)：
Father made me a doll.
→ A doll was made for me.
He wrote her a letter.
→ A letter was written to her.
三、有些双宾动词(如answer,deny,envy,refuse,save,spare等)通常用间接宾语(指人)作被动语态的主语,而将直接宾语用作保留宾语：
He answered me that question.
→ I was answered that question by him.