两者结构相似，很容易混淆。它们在用法上的区别是：much too＝too，但前者语气更强；too much＝much，但前者语气更强：

He drives much too fast. 他开车开得太快了。

He’s much too young. 他太年轻了。

The shoes are much too small for me. 这鞋子我穿太小了。

90 miles an hour is much too fast. 一个钟头开90 英里太快了。

There is too much rain. 雨水太多了。

You’re asking too much. 你要求太高。

You have given me too much. 你已经给我太多了。

I’ve got too much work to do. 我要干的工作太多。

You put too much salt in this food. 这个菜里你盐搁得太多了。

The room was small and contained far too much furniture. 房间很小而家具实在太多。

We have already taken up too much of your valuable time. 我们已经占用了你过多的宝贵时间。