区别是
too much 指的是过多，过分，用作副词或代词，形容词修饰不可数名词
too many 指的是多；过多；泼天; 接可数名词复数
much too 指的是太…；非常…，作副词,后接副词或形容词
例句分析
too much
1.I think you're expecting too much of me.
我认为你对我的期望太高了。
2.I know you need your freedom too much to stay with me.
我知道你太需要自由了，无法和我在一起。
too many
1.You gave me two too many.
你多给了我两个。
2.It's a trap too many people fall into.
太多人都掉进了这个陷阱中。
much too
1.The skin is much too delicate
皮肤太娇嫩了。
2.This dish is much too salty.
这个菜咸得齁人。
