His family haven't heard from him for a long time.

问题描述:

His family haven't heard from him for a long time.
可不可以用His family hasn't heard from him for a long time
什么时候family作集体名词什么时候作个体名词

翻译成家庭的时候,是单数概念
翻译成家人的时候,是复数概念