too much -----就看much
much too -----就看too      前面的不要管它. 归根结底是much和too的区别
比如我们说We are too old.所以我们也可以说We are much too old.
又比如我们说There's much water,我们也可以说There's too much water.

*(too) much 
    1．相当于形容词，意为“more than enough”，用在不可数名词前面作定语或在系动词后面作表语。如：
    Americans eat too much meat in my opinion．依我看，美国人吃的肉太多。
    I drank too much cola last night．昨天晚上我可乐喝得太多了。
    The work is too much for her．这工作她干不了。 
    She's afraid the trip will be too much for me．她怕我受不了旅途的劳累。 

    2．相当于名词，在句子中作主语或宾语。如： 
    Too much was happening all at once．同时发生的事情太多了。
    You have given me too much．你给我的太多了。 

    3．相当于副词，在句子中作状语。如：
    You work too much．你工作干得太多了。
    She talks too much．她话说得太多了。

*(much) too 
    much too的用法比较简单，只用作副词作状语，但它不单独使用，在句子中要修饰形容词或副词，但不修饰动词。如：
    You are much too kind to me．你对我实在太好了。
    It's much too cold．天气实在太冷了。
    You are driving much too fast．你开车太快了。