主谓一致问题No one but jane(knows)the secret Nobody but Mary and I

something,everything,anything,nothing,everybody,anybody,nobody,everyone,anyone 等复合不定代词,以及either,neither(neither of),each (each of),each one,no one,another等代词作主语时,谓语动词用单数形式.
例如：Neither of the answers is right.
Something is wrong with my computer.

but在主语后面出现的话不影响谓语动词，也就是说，你可以把but后面的东西盖住不看，只看but前面的主语就行。如果你觉得不好记，可以记成“就远原则”，就是谓语动词的单复数看离谓语动词远的主语。
和but 一样用法的还有with, along with ,as well as, together with, like, no less than,except等。...