present simple
- I send you a letter. (Te envío una carta)
A letter is sent to you by me.
You are sent a letter by me.present continuous
- I am sending you a letter. (te estoy enviando una carta)
A letter is being sent to you by me.
You are being sent a letter by me.
future
- I will send you a letter. (te enviaré una carta)A letter will be sent to you by me.
You will be sent a letter by me.
past simple
- I sent you a letter. (te envié/enviaba una carta)A letter will be sent to you by me.
You will be sent a letter by me.
present perfect
- I have sent you a letter. (te he enviado una carta)A letter has been sent to you by me.
You have been sent a letter by me.