是连词
both A and B----谓语用复数,...两者都（肯定） Both you and I are right.
neither A nor B----谓语取决于B...两者都不（否定）Neither you nor I am right.
Neither I nor you are right.
either A or B---谓语取决于B,...不是...就是...Either you or I am right.
Either I or you are right.
not only A but also B---谓语取决于B,...不但...而且...
Not only you but also I am right.
Not only I but also you are right.
