yy大唐无双:英语问题：3谓语动词

either...or...连接两个主语时，其谓语动词通常与最近的一个主语在人称和数上保持一致，这就是我们通常说的"就近原则"。例如：
Either you or I am going there tomorrow. 明天要么你去那里，要么我去那里。

当neither/nor的主语是单数时，谓语动词通常是单数形式，但有时也可用复数："Neither cat nor dog is（are） allowed."
这是因为neither/nor是单数either/or和复数both/and的否定态。不过如果两个主语都是复数，动词就必须是复数态："Neither cats nor dogs are allowed."
如果两个主语一个是单数，一个是复数，通常人们将复数主语放在后面，动词就按照“就近原则”采用复数态。即使复数主语放在前面，人们习惯上也常常采用复数动词。

When singular subjects are connected with
neither...nor, the verb is usually and more
acceptably singular, but is sometimes plural: "Neither cat nor dog is/are allowed." Again, this is because neither...nor is a negative counterpart to either...or, which is singular, and is also a negative counterpart to both...and, which is plural. But if both subjects are plural, the verb is plural: "Neither cats nor dogs are allowed." If there is a singular and a plural subject, it is most acceptable to put the plural subject second and have the verb agree with the nearest (plural) subject. Even if the plural subject is placed first, before the singular subject, it is common to use a plural verb.

忘记了。跟贴等答案