much和many的區別：
1、many修飾可數名詞復數，如：There aremany people.
much修飾不可數名詞復數，如：I have much money.
2、many作代詞代表可數名詞，如：Many of the students have great results.
much作代詞代表不可數名詞，如：Much of the air is fresh.
3、much還可以修飾動詞，many不行。
如：I love you so much.
4、much還可以修飾比較級，many也不行。
如：He's much taller than her.
It's much more difficult than you thought.