come from 还是 comes from

the Whites family come from England.
是说整个家庭的成员都来自英格兰,这里强调整体,用单数.
当集体名词看作整体时,用单数；着重强调组成该集体的各个成员,用复数.
集体名词作主语时
a） mankind/humanity/man（人类）作主语的时候,谓语动词一般用单数形式Only man is knows how to cook.b） 由people,police,cattle,youth等集体名词作主语的时候,谓语动词用复数形式
The cattle are grazing in the field.c） Family,croud,class,public,enemy等集体名词作主语的时候
i.若当整体看,则谓语动词用单数形式Our class is very diligent.
ii.若他们表示的人或者事物当作若干个个体来看,谓语动词则用复数形式When I came into the room,his family were watching TV.
iii.A family/group/class作主语时,谓语动词用单数families/groups/classes作主语时,谓语动词用复数
A group is coming to the zoo.