1.too much “太多”用作形容词,后接不可数名词.
如：too much water,too much snow,too much rain.
也可用作代词.如：Don't eat too much.别吃太多了.
2.much too "太”是副词.后接形容词或副词.It is much too cold today.He is always doing things much too carelessly.
too much当中的too是副词,修饰much.
much too当中的much是修饰too的,用来加强too的语气.如这样来理解就好用了：
把这两个词组中的第一个词都扔掉,看它们各自是什么意思,接什么词.
too much=much; much too=too.
