Question

sunil will post your letter into passive voice ​

Answer 1

$\huge\texttt{Answer:}$

$texttt{Passive\:Voice:}$

Your letter will be posted by Sunil

Answer 2

$\boxed{\Huge\sf{VOICE\:CHANGE:}}$

Active voice : Sunil will post your letter.

Passive voice : Your letter will be posted by Sunil.

●Here

• Object - Your letter ( AV )
• Subject - Sunil ( AV )

●It becomes

• Object - Sunil ( PV )
• Subject - Your letter ( PV )

●After the auxiliary verb will there is a use of be while changing it into passive voice.

●The past participle of the main verb is used. Here the main verb is post. Hence posted is used.