单复同形型.这类
集合名词的单数形式既可表示单数也可表示复数.作主语时，用单数动词或复数动词均可，有时意义区别不大. 【例如】The school teaching staff are (is) excellent. The public is (are) requested not to litter in the park. The teaching profession claim(s) to be badly paid. 这类集合名词常见的有：class,family,team,crew,board,herd,committee,party,jury,enemy,audience等. 根据说话人的心理意向若把这个集合名词所代表的人或事物看作一个整体，就认为是单数，用单数动词；若把它所代表的人或事物看作若干个个体的话，就认为其为复数，用复数动词. 试比较：The football team is playing well. 那个足球队打得非常漂亮. The football team are shavings bath and are then coming back here for tea. 足球队员们正在洗澡，然后来这里吃茶点. The family is a very happy one.那个家庭是一个非常
幸福的家庭. That family are very pleased about the news of William's success. 全家人对威廉的成功都感到很高兴