Hi Ungu, I hope that with these explanations, you'll understand it very well. "Muy" is an adverb that goes before qualified nouns, participles and adverbs to denote in them a superlative degree of significance, as in English "Very", for example: → muy frío (very cold). → muy alto (very high). → muy rápido (very fast). → muy inteligente (very smart). → muy lejos (far away). → muy triste (very sad). → muy cansado (very tired). ____________________________ The forms "tanto, tanta, tantos and tantas", with varying of gender and number, go before nouns, for example: tantas casas, tantos árboles, tanta belleza, tanto viento. The quantifier "tan" is a shorter form of "tanto" used before adjectives and adverbs, and that modifies verbs. Uses of the quantifier "tanto" or "tan" ____________________ • As comparative equality. In this case the second term is introduced by "como": → Es tan alto como su padre (He's as tall as his father). → En este curso hay tantas chicas como chicos (In this course there are many girls as boys). • As intensive quantifier followed by a consecutive sentence introduced by the conjunction "que": → Es tan inteligente que él se graduará pronto (He's so smart that he'll graduate soon). → En esta clase hay tantos alumnos que no caben en el aula (In this class there are many students who don't fit in the classroom). → Hoy se ha portado tan mal que no saldrá a jugar (Today she has behaved so badly that she won't come out to play). • "Tanto" + "como" = Conjunction composed: → Estudia tanto de día como de noche (He studies both day and night). → Conoce tanto la historia como la geografía de su país (She meet both history and geography of their country). I sincerely hope this helps. Have a nice day!

muy frio - very cold tan frio como el hielo - as cold as ice Es distinto, el tan es una comparación, el muy sólo es un adverbio que connota mayor "cantidad" por decirlo de alguna manera :) Si necesitas más ya me dirás! Míriam