请问各位“这是我的责任”怎么说

1.It's my responsibility.

2.It's my duty.

3.it's my fault.

出了差错表述这是我的的错我的责任用3，表述职责有具体行为的象收发室老头开关门之类的用2，无形的，象领导负责安全生产之类的用1。

It's my responsibility.

如果职责和责任很多,就要用复数:
These are my responsibilities.

如果你想强调你的过错，用 fault

口语可以说：My fault 我的错。比如打篮球的时候你的一个失误，你可以对你的队友这么说。Sorry, it's my fault.

正式一些的是：this is my fault.

如果强调的是你承担的一些义务等。I will take the responsibility. 或者I will take the responsibility of sth.

it is my fault
i am responsible to do something

This is my responsibility.

这一句就足够了 希望能帮到你！

it's my responsibility.