____ had never occurred to me that he should have some deep personal objection.
问题描述：
____ had never occurred to me that he should have some deep personal objection.
答案是It,做同位语.这个我也想得明白,
但是如果用What也能说通啊～What的话,当主语从句.
答
只能用 It 的.
如果你用what 当主语从句的引导词.即,what had never occurred to me是主语,那么它的谓语动词哪去了?你说呢?
希望能够帮助到你,祝你学习愉快!那么，如果改成主语从句，怎么改呢？What had never occurred to me was that he should have some deep personal objection.谓语动词是was.整个句子属于： S+V+P，即：主系表结构。