2 Periodo
A informal letter is a letter that you can write for a person whom yo have a nos-profeswional relationship.
You can write it for your friends or your family
Body
Adress
Date
Closing
Signature
Opening
I trust you're having a good day
I thought of dropping in a line
OPENING
How goes the day, dear friend?
THE MAIN IDEA OF THE LETTER
Write in 2 – 5 paragraphs Write in brief and simple English
The functions are: To invite, to congratulate.
EXAMPLE
Dear Antonio:
I am writing to inform you that I have finally arrived in Bilbao. I arrived last Monday and now I am already installed in a department that I will rent with a partner of the master's degree who is French. I am very happy because soon I will start studying. Besides, I already knew the university and I loved it. It is very modern and big.
I'm really excited about this new experience that I'm about to start. I think it was the best decision I've made in my life. I hope everything goes well and soon you can come visit me. My parents have told me that they would like very much to come next summer. I hope I can.
I would like to know from you. I hope your work goes well and that you like what you are doing. My parents told me that you work for a major Japanese company that is opening a market in Mexico.
Without further ado, I was just writing to tell you that I was already here. I hope everyone is fine over there. I send many greetings, especially to my nephews that I imagine will be very large. A hug and I await your response. Greetings.
Atte. Daniel
https://owlcation.com/academia/Examples-of-how-to-write-informal-letters-in-English-Personal
https://www.quora.com/What-are-the-best-opening-lines-for-an-informal-letter
https://es.scribd.com/doc/37480629/Informal-Letter-Body