much as看似简单，但是实际运用中却相当复杂，不仅用法颇多，而且许多含有much as结构的句子往往不好理解。它可以表示数量，表示程度，还可以表示经常性（=as often as）。
In fact it cost me as much as 100 dollars.
事实上，它整整花了我100美元。
We walked as much as 50 miles that day.
那天我们整整走了50英里。
The speed can vary by as much as 15 percent.
其速度的差别可高达15%。
