as...as表示像...一样，（强调数量）多达，只有。
通常中间只能用形容词或副词的原级，不能用比较级或最高级。

1.若涉及数量或程度，可用“as much+不可数名词+as”和“as many+可数名词复数+as”。如：
He doesn’t pay as much tax as we do / as us.
他没我们交的税款多。

There are not as many restaurants as there were.
现在餐馆没有过去多了。