如果你想表达你已经完成了英语作文作业，你可以这样说：
I have finished my Engpsh essay assignment.
My Engpsh essay assignment is completed.
The Engpsh essay assignment is done.
你也可以这样说：
I completed the Engpsh essay assignment.
I have completed the Engpsh essay assignment.
I finished the Engpsh essay assignment.
你还可以这样说：
The Engpsh essay assignment is now done.
The Engpsh essay assignment is now complete.
The Engpsh essay assignment is now finished.