The words much and many mean a lot of.
.- If a noun is in singular, we use much.
Example: Much money
.- If a noun is in plural, we use many.
Example: Many friends
USE OF MUCH / MANY
We normally use much / many ony in questions and negative sentences.
Example: How much money do you have?
Mary does not have many friends.
In positive sentences with so, as or too, we also use much / many.
Example: Mary has so many friends.
She has as many friends as Sue.
Kevin has too much money.
COUNTABLE / UNCOUNTABLE NOUNS
Countable nouns have a singular and plural form. In plural, these nouns can be used with a number (that's why they are called "countable nouns").
Countable nouns take many.
Example: 100 friends - many friends
Uncountable nouns can only be used in singular. These nouns cannot be used with a number (that's why they are called "uncountable nouns").
Uncountable nouns take much.
Example: 100 money - much money
Of course you can count money, but then you would name the currency and say that you have 5 euro (but not "5 money").
very clear ....thanks
your explanations are always very useful !!
Oh, thanks... but I think that I don't have more ideas... they are finished, at least for the moment... :-(