Напишите, что ты можешь делать с письмом. Я пишу письмо. Я отправляю письмо в почтовый ящик. Я читаю письмо. Я кладу письмо в сумку.

I'm writing a letter. I'm sending a letter to the mailbox. I'm reading the letter. I'm putting the letter in the bag. I write a letter to my dear friends. I stick stamps on the letter. I give the letter to the postman. I give the letter for registration for sending. I'm sending a letter with a notification. I put the letter in a large envelope. I fold the letter into a small envelope. I read my letter to everyone. I have kept this letter for several years. I will give the letter personally to the person.