只能用 It 的.

如果你用what 當(dāng)主語從句的引導(dǎo)詞.即,what had never occurred to me是主語,那么它的謂語動詞哪去了?你說呢?

希望能夠幫助到你,祝你學(xué)習(xí)愉快!那么，如果改成主語從句，怎么改呢？What had never occurred to me was that he should have some deep personal objection.謂語動詞是was.整個句子屬于： S+V+P，即：主系表結(jié)構(gòu)。