Question

Narration change for the we said to our teacher ,"we shall obey you"

Answer 1

Answer:

We promised that we would obey our teacher.

OR

We promised our teacher that we would obey him/her.

Explanation:

This is now in indirect / reported speech.

"him" or "her" may be used according to the gender associated with "teacher".

Answer 2

Answer:

we promised that we would obey our teacher