as much等同于the same amount of，表同量和同一事情。
many和much之后不接名词时，作为代名词;另外much也可用副词。
例句：
There isn't much mail today.
今天邮件不多。
Need you have paid so much?
你用得着花那么多钱吗？
How much thickener is used?
用了多少增稠剂？
Many Quebeckers are federalists.
很多魁北克人是联邦主义者。
The war separated many families.
这场战争使许多家庭离散。
Many people choose not to marry.
许多人情愿不结婚。