我已经完成了自己该做的任务用英文怎么

我已经完成了自己该做的任务.
I have completed the task that I should do.
I have completed the task which should be done by myself.
I have completed the task which I have to do.
都可以的

I've accomplished what need to be done by myself

I have finished my tasks that I should to do

I have finished the work that I should do myself.

1、此意包括两层意思，可以拆分开分别根据需要进行不同的翻译

• 我已经完成了自己任务

　　I have done my assignment.（做完分配任务）

　　I have fulfilledthe role.（履行完角色）

　　I have completedmy task （完成指定任务）

　　I have finishedmy errand （结束差事）

　　I have accomplishedmy mission （完成使命）

• 我该做的任务

　　I should do the assignment

　　I have to playthe role.

　　I ought to dothe task

　　I am supposed todo the errand

　　I am necessary toaccomplish the mission

2、把上面的两个意思合在一起（后面的要省略重复部分，改为定语从句）

　　I have done my assignment (that) I should do.

　　I have fulfilled the role (that) I have to play.

　　I have completed my task (that) I ought to do.（完成指定任务）

　　I have finished my errand (that) I am supposed to do（结束差事）

　　I have accomplished my mission (that) I am necessary to do.

3、还可以把 “先行词 + 定语从句” 改为 what 从句

　　I have done what I should do.

　　I have fulfilled what I have to play.

　　I have completed what I ought to do.（完成指定任务）

　　I have finished what I am supposed to do（结束差事）

　　I have accomplished what I am necessary to do.