Question

i shall post these letters Tommorow - Chnage Voice​

Answer 1

These letters were posted by me.

I think it will be helpful

Answer 2

Answer:

These letters will be posted tomorrow.

Explanation:

These letters will be posted tomorrow. (Passive) The sentence is in Simple Future Tense (Active). Modal (shall) is used in Active, it will change toshall be/will be in Passive