Iam writing a spanish email

use expressions with tener to talk about what you have to do this weekend and what you feel like doing

well obviously this email has to be mature if thats the right word so basically you need to wtch how you use these words because in spanish theres 3 ways of using these words. The three ways that these can be used is 1. when speaking to a friend. 2. when speaking to an adult or someone more in place of authority. and 3. when your having a casual conversation.