你可以把as much + 不可数名词 + as, 或as many + 可数名词+ as 看作是一种比较结构句型。因为比较的是名词短语，所以要有名词，而且通常形容词要放在名词前面。请看两个例句：

1. If there were as many women as there are men in parliament, the situation would be very different.《剑桥词典》

2.  I hope you have as much fun as I did. 《朗文词典》

你的句子如果改为以下句式，也是符合语法的。

We often just walk around the town center, seeing our friends as much as we can.