COUNTABLE OR UNCOUNTABLE NOUNS? EXERCISE 2 (ESL)

Grammar review Does this noun take an -s?

This exercise isn't about which quantifier to use, it's about whether the noun itself can be pluralized at all.

Countable nouns pluralize normally: one thing / many things, one experience / several experiences, one capital / many capitals.

Uncountable nouns never take -s, even when the sentence feels like it's describing more than one: information (never "informations"), furniture, luggage, advice, news, homework.

A few common categories of uncountable nouns worth recognizing:
Foods and substances described in general, not as individual pieces: milk, cheese, rice, fruit
Abstract qualities or events: anger, applause, information
General accumulations rather than a count of items: garbage, traffic, luggage

Two tricky cases:
Hair is uncountable when talking about all the hair on someone's head as a whole (“She wants to dye her hair.”), but countable when talking about individual strands (“There's a hair in my soup.”).
People is already the plural of person, so it doesn't take another -s. “Peoples” only shows up when referring to distinct ethnic or national groups, like “the peoples of Africa.”

Quick test: if you can't put a number directly in front of the noun (three furnitures ✗) and need a counter word instead (three pieces of furniture ✓), it's uncountable.