一般集合名词视为不可数名词,其后的谓语动词通常用单数.像 people,police,familiy.等但是有些集体名词也是可数名词.比如：family,his family is a large family.his family are early risers.第一个family是指整体概念所以是单数,第二个family是指全部家人,所以用复数.