Much, many, a lot of, lots of: quantifiers

We use the quantifiers much, many, a lot of, lots of to talk about quantities, amounts and degree. We can use them with a noun (as a determiner) or without a noun (as a pronoun).

Much, many with a noun

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We use much with singular uncountable nous and many with plural nouns:

[talking about money]

I haven't got much change. I've only got a ten euro note.

Are there many campsites near you?

Questions and negatives

We usually use much and many with questions and negatives:

Is there much unemployment in that area?

How many eggs are in this cake?

Do you think many people will come?

It was pouring with rain but there wasn't much wind.

There aren't many women priests.

Affirmatives

In affirmative clauses we sometimes use much and many in more formal styles:

There is much concern about drug addiction in the US.

He had heard many stories about Yanto and he knew he was trouble.

In informal styles, we prefer to use lots of or a lot of.

I went shopping and spent a lot of money.

NOT: I went shopping and spent much money.

See also:

Lots, a lot, plenty

Much of, many of

when we use much or many before articles (a/an, the), demonstratives (this, that), possessives (my, your) or pronouns (him, them), we need to use of.

How much of this book is fact and how much is fiction?

Claude, the seventeenth-century French painter, spent much of his life in Italy.

Unfortunately, not many of the photographers were there.

How many of them can dance, sing and act?

This much, that much

Spoken English:

When we are talking to someone face-to-face, we can use this much and that much with a hand gesture to indicate quantity.

[the speaker indicates a small amount with his fingers]

I only had that much cake.

General and specific determiners

Determiners are words which come at the beginning of the noun phrase.

They tell us whether the noun phrase is specific or general.

Determiners are either specific or general

Specific determiners:

the definite article	the
possessives	my, your, his, her, its, our, their, whose
demonstratives	this, that, these, those
interrogatives	which

We use a specific determiner when we believe the listener/readers knows exactly what we are referring to:

Can you pass me the slat please?

Look at those lovely flowers.

Thank you very much for your letter.

Whose coat is this?

General determiners:

a; an; any; another; other; what

when we are talking about things in general and the listener/reader does not know exactly what we are referring to, we can use a uncount noun or a plural noun with no determiner:

Milk is very good for you. (= uncount noun)

Health and education are very import. (= 2 uncount nouns)

Girls normally do better in school than boys (= plural nouns with no determiner)

or you can use a singular noun with the indefinite article a or an:

A woman was lifted to safety by a helicopter.

A man climbing nearby saw the accident.

We use the general determiner any with a singular noun or an uncount when we are talking about all of those people or things:

It's very easy. Any child can do it. (= all children can do it)

With a full licence you are allowed to drive any car.

I like beef, lamb, port any meat.

We use the general determiner another to talk about an additional person or thing:

Would you like another glass of wine?

The plural from of another is other:

I spoke to John, Helen and a few other friends.

A lot of, lots of with a noun

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We use a lot of and lots of in informal styles. Lots of is more informal than a lot of. A lot of and lots of can both be used with plural countable nouns and with singular uncountable nouns for affirmatives, negatives, and questions:

We've got lots of things to do.

That's a lot of money.

There weren't a lot of choices.

Can you hurry up? I don't have a lot of time.

Are there a lot of good players at your tennis club?

Have you eaten lots of chocolate?

Much, many, a lot of, lots of: negative questions

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When we use much and many in negative questions, we are usually expecting that a large quantity of something isn't there. When we use a lot of and lots of in negative questions, we are usually expecting a large quantity of something.

Compare
Haven't they sold many tickets?	(No, they haven't) The speaker expects that they have sold a small quantity of tickets.
Haven't they sold a lot of tickets?(or lots of)	(Yes, they have) The speaker expects that they have sold a large quantity of tickets.
Isn't there much food left?	(No, there isn't) The speaker expects that there is a small quantity of food left.
Isn't there a lot of food left? (or lots of)	(Yes, there is) The speaker expects that there is a large quantity of food left.

Much, many, a lot, lots: without a noun

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We usually leave out the noun after much, many and a lot, lots when the noun is obvious:

A: Would you like some cheese?
B: Yes please but not too much. (not too much cheese)

A: Can you pass me some envelopes?

B: How many? (how many envelopes?)

A: How many people came?

B: A lot. (or Lots.)

Much with comparative adjectives and adverbs: much older, much faster

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We can use much before comparative adjectives and adverbs to make a stronger comparison:

Sometimes the prices in the local shop are much better than the supermarkets's prices.

I feel much calmer now I know she's safe. (much calmer than I felt before)

She's walking much more slowly since her operation. (much more slowly than before)

Too much, too many and so much, so many

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Too much , too many with a nonu

We often use too before much and many. It means 'more than necessary'. We can use too much before an uncountable noun and too many before a plural noun, or without a noun when the noun is obvious:

I bought too much food. We had to throw some of it away.

They had a lot of work to do. Too much. (too much work)

There are too many cars on the road. More people should use public transport.

There are 35 children in each class. It's too many. (too many children)

So much, so many with a noun

We use so rather than very before much and many in affirmative clauses to emphasis a very large quantity of something:

He has so much money!

NOT: He has very much money!

There were so many jobs to do.

As much as, as many as

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When we want to make comparisons connected with quantity, we use as much as and as many as:

Try and find out as much information as you can.

You can ask as many questions as you want.

See also:

As....as

As much as, as many as

Much, many and a lot of, lots of: typical errors

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We use much with uncountable nouns and many with countable nouns:

It doesn't need much effort.

NOT: It doesn't need many effort.

We usually use a lot of and lots of rather than much and many in informal affirmative clauses:

There are a lot of monuments and a lot of historic buildings in Rome.

NOT: There are many monuments and many historic buildings in Rome.

She gave me a lot of information.

NOT: She gave me much information.

We don't use of after much or many when they come immediately before a noun without an article (a/an, the), demonstrative (this, that), possessive (my, your) or pronoun (him, them):

They haven't made many friends here.

NOT: They haven't made many of friends here.

We don't use a lot of without a noun:

A: Do many people work in your building?

B: Yes, Quite a lot. (quite a lot of people)

NOT: Quite a lot of.

http://dictionary.cambridge.org/grammar/british-grammar/much-many-a-lot-of-lots-of-quantifiers?q=QUANTIFIERS

https://learnenglish.britishcouncil.org/en/english-grammar/determiners-and-quantifiers