too much一般和to搭配，构成“太多...以至于不能...”的特殊含义；而so much一般和that连用，构成“太多...以至于...”too much一般是相对独立的，与上文没有太大的关联；而so much与上文的联系十分紧密，不可分割。
too much的例句
I've got far too much to do.
我要做的事情太多了。
Using too much water could spread the stain.
用水太多可能使污迹扩散。
I think the problem can be got over without too much difficulty.
我认为这个问题不太难解决。
Don't read too much into what she says.
不要在她的话里加进太多自己的理解。
Don't use too much of it ─ it cost a lot of money.
这东西很贵，不要用得太多。
so much的例句
You'll get fat if you eat so much chocolate.
你如果吃这么多巧克力就会发胖的。
Rarely has a debate attracted so much media attention.
难得有一场辩论吸引这么多的媒体关注。
We have so much to do.
我们有很多事要做。
Try not to make so much noise.
别那么吵吵闹闹的。
I told the boys off for making so much noise.
孩子们太吵，我把他们训斥了一顿。