由or, either...or, neither...nor, not only...but also连接的词，如果数和性是一致的，就用其相应的代词；如果性和数不一致，代词与其临近的名词保持一致。

【例如】

Neither he nor she wants to visit her uncle. Not only my mother but also I care a lot about my father.

each, everyone, everybody, everything, no one, nobody, nothing, anyone, anybody, somebody等修饰主语或作主语时，相应的代词用单数。

【例如】

Everybody talked at the top of his voice. Everything is ready for the picnic, isn’t it?