family与families的用法

family的意思是大家庭（包括父母子女及近亲）；家族；家（包括父母子女）；家庭的；适合全家人的。例如：His family have been positive influence on him. families是复数，表示家庭；家；大家庭；亲属。例如：There was a blood fead between the two families.