I just learned a new word "demasiado" which can be an adjective or an adverb. If it is used as an adverb, then what's the difference between it and "tan"?
I found the following phrases from SD's online dictionary:
(1) tan grande; tan rápido; tan largo; tan feo
(2) demasiado grande; demasiado rápido; demasiado pesado