主语补语语法书上说,含有复合宾语的主动句变为被动句时,将宾语变成主语,宾补仍保留在动词之后,成为主补.啥叫主补?它给的例句是She was called the 'iron lady'.

She asked me to come.(to come是宾补) I was asked to come.(to come 是主补) I saw him sitting on the bench under the tree.(sitting on the bench under the tree是宾补) He was seen sitting sitting on the b...