1. I am from Mexico. I'm from Mexico.
2. He is not Spanish. He isn't Spanish.
3. They are from the UK. They're from the UK.
4. It is not Monday. It isn't Monday.
5. She is American. She's American.
6. We are not Brazilian. We aren't Brazilian.
7. You are from Turkey. You're from Turkey.
8. It is good. It's good.