responsibility的形容词形式是responsible

responsibility

n.责任;负责;事故责任;职责;义务;任务

复数： responsibilities

例句：

Thats too much responsibility for a child.

对于一个孩子来说，这责任是太重了。

I think we have a moral responsibility to help these countries.

我认为我们在道义上有责任帮助这些国家。