MUCH and MANY.

Much and many are mainly used in questions and negative sentences to mean 'a large number of'. There are, of course, alternatives to “a lot of” / “lots of”, depending on the context: “ a great deal of”, “large amounts of”, etc. 

• QUESTIONS 

How much ....? + uncountable nouns 
Examples: 

How much sugar do you take in your coffee? 

How much money do you want for this? 

Do you have much work to do? 

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How many ....? + countable nouns 
Examples: 

How many students are there in each class? 

How many people are you expecting? 

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• NEGATIVE SENTENCES 

Examples: 

He doesn’t earn much money. (money => uncountable) 

Not many people have heard of her. (people => countable) 

Barbara doesn’t have many friends.