many · determiner /ˈmen.i/Full view
many
A1 a large number of
Dictionary examples:

We've known them for many years.

I don't have many clothes.

Were there many people at the party?

Not many people have heard of him.

Many people would disagree with your ideas.

I've met him so many times and I still can't remember his name!

There are too many people applying for too few jobs.

Learner example:

We [are] doing so many interesting things at college. (Skills for Life (Entry 1); A1; Slovak)

how many
A1 used in questions to ask about the number of something
Dictionary examples:

How many people are coming tonight?

How many students are there in each class?

How many hours do you work?

Learner example:

How many friend[s] are coming? (Key English Test; A2; Arabic)

as many as
C1 used before a number or amount to show that the number or amount is large
Dictionary example:

As many as 6,000 people may have been infected with the disease.

Learner example:

The quantities of goods by pipeline in 2002 was approximately 10 times as many as that in 1974, 21 and 2 million tonnes respectively. (International English Language Testing System; C1; Japanese)

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