两者都表示“许多”，但 many 修饰或代替可数名词（复数），与 few（少数）相对；而 much 用来修饰或代替不可数名词（单数），与little（少量）相对。
相关介绍
例句：
Did you see many people there?
你在那儿看见许多人了吗?
Many poets have died young.
许多诗人很年轻就死了。
Do you have much money left?
你剩的钱多吗?
He doesn't spend much time preparing his lessons.
他备课不花太多时间。
