tan

adverb

1. as (… as) tan … como

   • Max es tan alto como Pedro.
     Max is as tall as Pedro.

2. so

   • Estoy muy cansado, pero nunca he estado tan feliz.
     I am very tired, but I have never been so happy.

Learn it in Unit 21: Better, bigger, the best (A2): Comparatives and superlatives · A2