We use "How many" for questions about countable or plural objects, and "How much" for questions about non-countable or singular objects. "How much" is also used when asking about the cost or quantity of a single object. Most nouns form their plural by adding "-s", though some like "man" become "men" and "child" becomes "children" in their plural forms.

1. HOW MUCH? / HOW MANY? COUNTABLE OR UNCOUNTABLE