I have learned that I must do my homework.
My parents said I should promise to do my homework.
So, I have learned that doing my homework is important.

* My parents said homework is promise. (What do you mean here? Do you want to say your parents said you should promise to do your homework. )

Thank you still for doing your homework, Sung Jin! I am happy that you try to do your homework by yourself. Just be careful in constructing sentences because it might give another meaning for the reader, okay? See you in class and take care always.

~Teacher Cassie