many 用来表示某个可数名词的数量大，意为“许多”。
一、大部分情况下 many 用于否定句和疑问句中，例如：
Were there many children at the party?
聚会上有很多孩子吗？
I don’t have many relatives. We’re a small family.
我没有多少亲戚。我们是一个小家庭。
many 可以与 not 连用，相当于 few，例如：
Not many people realise that the mathematical notion of ‘zero’ is a relatively recent invention.
没有多少人意识到“零”的数学概念是一个相对较新的发明。
二、用于肯定句的情况
many 通常不单独在肯定句中使用，而是使用 a lot of 代替，例如：
There were a lot of people at the swimming pool this morning.
今天早上游泳池里有很多人。
但是在非常正式的上下文中，使用 many 代替 a lot of 和 lots of，例如：
Many politicians have suffered at the hands of the popular press.
许多政客在大众媒体的控制下遭受了苦难。
Many of his friends and colleagues were shocked upon hearing of his sudden death.
他的许多朋友和同事听到他的突然死亡感到震惊。
在名词有定语从句修饰的肯定句中，通常用 many，例如：
There are many elderly people who have never touched a computer in their lives.
有许多老年人一生中从未接触过电脑。
三、在表示数量大的程度时，可以用 very, a great, too 或 so 来修饰，例如：
very many:
Very many people have complained about the situation.
很多人抱怨过这种情况。
a great many:
There were a great many questions which were left unanswered at the end of the investigation.
在调查结束时，有许多问题没有得到回答。
too many:
There are too many mistakes in this essay.
这篇文章错误太多。
so many:
Why do so many people watch reality TV shows?
为什么这么多人看真人秀？
四、as many as + 数字，用来表示数量大的让人震惊，意为“多得达到，如此多”，例如：
As many as 5,000 people are believed to have died in the earthquake.
据信有多达5000人在地震中丧生。
五、in as many 意为“…的同样的”，例如：
He doesn’t seem to be very lucky in love. He’s had three girlfriends in as many months.
他在爱情上似乎不太走运。在同样的三个月里他有三个女朋友。
解析：此句相当于 He's had three girlfriends in three months.
六、关于 many of
1、其后接名词时，该名词通常应是特指的（比如有 the, this, that, these, those, my, our, Tom’s 等修饰），作主语时，谓语用复数，例如：
Many of the books are mine.
很多书都是我的。
Many of those most affected are elderly.
受影响最大的人中很多都是上了年纪的。
Many of the women are addicted to heroin and cocaine.
这些女人中很多人都吸食海洛因和可卡因成瘾了。
Many of these recipes are highly flavoured.
这些菜谱中很多都添加了极浓的调味料。
Many of these cushions have survived and are very collectible.
这些垫子很多都保存了下来，非常有收藏价值。
Many of his ideas were amusing to her.
他的许多想法使她感到有趣。
2、如果名词没有表特指的限定词，通常就不用 of，例如：
叶子剩下的不多了。
误：There aren’t many of leaves left.
正：There aren’t many leaves left.
油菜籽剩下的不多了。
误：There aren't many of rape seeds left.
正：There aren't many rape seeds left.
他家人口不多。
误：There aren't many of people in his family.
正：There aren't many people in his family.
3、如果用了介词 of 又没有特指限定词，通常是不可以的。如：
许多学生读过它。
误：Many of students have read it.
正：Many of the students have read it.
4、在人称代词前总是用 many of，其中的 of 不能没有。如：
Many of us were too tired to go further.
我们很多人都累得不能再往前走了。
Many of them also offer a mail-order service.
他们中有许多家也提供邮购服务。
Many of them can speak two or three or more languages.
他们当中许多人都会说两三门语言，有的人甚至更多。
七、可与 more 连用，之后接复数名词，例如：
There have been many more burglaries this year.
今年盗窃案比过去多好些。
Television and radio needed many more women in senior jobs.
电视和广播领域需要有更多女性来担任高级职位。
The latest techniques in oceanography are now available to many more scientists.
更多的科学家现在能够接触到海洋学的最新技术。
有时其后的名词可承前省略，例如：
Many people support the government, but many more are against it.
许多人支持政府，但更多得多的人反对它。
另外，其后修饰的不是名词，而是形容词或副词，则用much more，不用many more，例如：
You must work much more carefully.
你应工作得更加细心。
It was much more enjoyable than I had expected.
这比我预期的有趣得多。
I found English much more difficult to learn.
我发现英语难学得多。
八、many a + 单数可数名词，形式上为单数，但意义上为复数（意为“许多”），若用作主语，其谓语通常与形式一致而不与意义一致，即谓语用单数，例如：
Many a young man has tried and failed.
很多年轻人都试过，而且失败了。
Many a customer has been lost through negligence of service.
由于服务不周失去了许多老主顾。
Many a student fails to pass on the examination.
许多学生考试不及格。
Many a mother tries to act out her unrealized dreams through her daughter.
有许多母亲都试图在女儿身上实现自己未竟的梦想。
Many a young hopeful went to hollywood.
许多满怀希望的青年涌至好莱坞。
注意，“many a + 单数名词”是一个十分正式的结构，在口语或非正式文体中一般都用“many +复数名词”代之。
九、the many 意为“绝大多数人”，单独使用，谓语用复数，例如：
The many are kept in ignorance while the few prosper.
绝大多数人被蒙在鼓里，少数人却兴旺发达。
十、与 a great/good number of, a great/good amount of 等表达不同，a great/good many 后接名词时，不用介词 of，例如：
I’ve known her for a great many years.
我认识她好多年了。
A great many people were at the meeting.
很多人参加了会。
A great many changes have happened in the neighbourhood, since you went away.
自从你走了以后，这带发生了好多事情。
当其后接的是人称代词或带有限定词的名词时，则要有 of。如：
A good many of them have bighouses.
他们中的许多人有大房子。
A great many of them are out of work.
他们很多人失业了。
A great many of the houseswere destroyed in the earthquake.
这次地震毁了很多房屋。
十一、how many + 可数名词复数用来讨论或提问数量，例如：
I was surprised by how many people were there.
我很惊讶有那么多人在那里。
How many people were there?
有多少人？
How many times do I have to tell you to lock the door?
我要告诉你多少次才能锁门？
解析：以上两句若表示数量不多时，可以用 not very many 回答。
十二、常见的 many 习语
1、as many as … 表示惊讶，意为”多达，如此多“，例如：
There were as many as 200 people at the lecture.
听讲的有200人之多。
2、many's the 许多次，常常，例如：
Many's the time I heard her use those words.
我不止一次听她说过那样的话。
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