family的名词复数是families；
family
n.家，家庭(包括父母子女);(大)家庭(包括父母子女及近亲);亲属;家族；
adj.家庭的;一家所有的;适合全家人的
His family have been a very positive influence on him.
他的家庭对他有十分良好的影响。
The new system expanded the role of family doctors.
新体制扩大了家庭医生的作用。
I always think of you as one of the family.
我一直把你当成自家人。
