Much and many both express large quantities, but which one you use depends entirely on the type of noun in the sentence. Getting this right is one of the first quantifier skills English learners need to master.
Grammar reviewMuch or many?
The choice between much and many depends entirely on whether the noun it modifies is countable or uncountable.
MANY — use with countable nouns (things you can count individually): chairs, countries, mistakes, songs, questions, cups
→ How many chairs are there? / She’s made many mistakes.
MUCH — use with uncountable nouns (things that can’t be counted individually): water, time, furniture, luggage, rice, meat, money
→ How much water do you drink? / We don’t have much time.
Tricky uncountables to remember: furniture, luggage, advice, information, news, equipment, traffic, homework — these look like they could be countable but are not. You say a piece of furniture, not a furniture.
Both are used mainly in questions and negatives:
In positive statements, a lot of is more natural: “She has a lot of relatives.”
In formal writing, much in positive statements is acceptable: “Much progress has been made.”
Quick test: Can you put a number in front of the noun? If yes → many. If no → much.