* Tan: This word is used to compare two things or to express a degree of something. For example:
* Soy tan alto como tú. (I'm as tall as you.)
* La comida estaba tan deliciosa. (The food was so delicious.)
* Así: This word is used to refer to something in a general way, or to indicate a way of doing something. For example:
* Así es la vida. (That's life.)
* ¿Cómo se hace así? (How do you do it like that?)