指代意义决定谓语的单复数1) 在代词what, which, who, none, some, any, more, most, all等词的单复数由其指代的词的单复数决定。
All is right.
　　　 (一切顺利。
) All are present.
　　(所有人都到齐了。
) 2) 集体名词作主语时，谓语的数要根据主语的意思来决定。
如family, audience, crew, crowd, class, company, committee等词后用复数形式时，意为这个集体中的各个成员，用单数时表示该个集体。
His family isn't very large.
　　他家不是一个大家庭。
His family are music lovers.
　他的家人都是音乐爱好者。
但遥名词people, police, cattle, poultry等在任何情况下都用复数形式。
Are there any police around?
3)有些名词，如variety, number, population, proportion, majority 等有时看作单数，有时看作复数。
A number of +名词复数+复数动词。
The number of +名词复数+单数动词。
A number of books have lent out.
The majority of the students like English.