Question

many letters were sent by me to your office active to passive​

Answer 1

Many letter were sent by me to your office can be changed into active: I sent many letters to your office.

What are active and passive sentences?

• An active sentence is one in which the verb directly executes an action.
• A passive sentence is one in which the subject does not do any kind of action.
• Both active and passive sentences are grammatical voices.
• Passive sentences have auxiliary verbs in them.
  

Answer 2

Answer:

I have send many emails to the office