Как написать писмо другу на англиском

Hello, Nik

I want to tell you: what did I do last week. On Monday, Tuesday, Wednesday, Thursday and Friday I went to school and did my homework. And on Saturday I was went to the zoo. There were monkeys, elephants, tigers, lions, crocodiles and many other animals. On Saturday I went to my grandparents. They are really nice and happy, so it was very fan.

And you? How are you? What did you do last week?

Best wishes, Dan.

Например так. Можно ещё поменять имена.