English grammar rule There re many

A quantifier answers the question how much or how many. There are several ways to do this: numbers (two, 144), adjectives (all, several), prepositions (among, between), and pronouns (these, those) answer the question simply. There are also other nouns that answer the questions with prepositional phrases (plenty of, a lot of, one of). Keep in mind that countable nouns require you to use a plural quantifier.

Examples of 'There re many' rule

Incorrect	We took both cat because they got along well.
Correct	We took both cats because they got along well.
Incorrect	Jim has taken many flight.
Correct	Jim has taken many flights.