many much的用法和区别如下：
1、意思不同：
many意思：n.许多；许多人或物.
much意思：n.许多。
2、用法不同：
many用法：用作定语,只有在对比结构中,可用作表语,往往含有“虽然多”或“确实多”的意思。
例句：Many of these substances are innocuous.这里的许多物质都无害。
much用法：修饰动词(可放于其前或其后)，也常修饰形容词或副词的比较级或最高级和分词。一般用于疑问句或否定句。
例句：I think we may learn much from it.我想我们能从中学到许多。
3、侧重点不同
many侧重点：用于一般现在时。
much侧重点：用于一般现在时或一般将来时。
many much双语例句：
1、The college has close links with many other institutions.
这所学院与其他许多的机构有着紧密的联系。
2、But there are many people groups within the human race.
在人类大家庭有许多的民族。
3、There were 50 people there,at the very most.
那儿最多只有50个人。
4、We do not have any more information at the present time.
目前我们没有进一步的消息。
5、There aren't that many people here.
这里并没有那么多人。
6、I would very much like to see you again.
我很想再见到你。
7、He was much loved by all who knew him.
认识他的人都很喜欢他。
8、Most of us use public transport to get to work.
我们大多数人都乘公交车辆上班。
9、My new job is much the same as the old one.
我的新工作和旧工作差不多。
10、This is one of the most commonly used methods.
这是最常采用的方法之一。