Написать а пассивном залоге. I buy a new dress. He sent a post card. You planted a tree

Question

Написать а пассивном залоге. I buy a new dress. He sent a post card. You planted a tree

Answer 1

I buy a new dress. - A new dress is bought by me.
He sent a post card. - A post card was sent by him.
You planted a tree. - A tree was planted by us.