As a rule of thumb, countable nouns in the singular take the article ‘a’ or ‘an’ AND can be plural. Countable noun examples: A dog / How many dogs? / Fewer dogs An apple / How many apples? / Fewer apples A car / How many cars? / Fewer cars An umbrella / How many umbrellas? / Fewer umbrellas A glass / How many glasses? / Fewer glasses A candle / How many candles? / Fewer candles Uncountable noun examples: Sugar / How much sugar? / Less sugar Jewelry / How much jewelry? / Less jewelry Cheese / How much cheese? / Less cheese Wine / How much wine? / Less wine Furniture / How much furniture? / Less furniture Money / How much money? / Less money [Source: learn-english-online.org] There are some special cases where a noun can be both countable and uncountable, depending on the context in which it is used. “Fruit” is a good example. Study the following sentences and you should see the difference: I hate fruits! I would like to eat less fruit. I eat three fruits every day. I’m going to eat one fewer fruit every day. However, this is still a gray area, as many people would argue that “fruit” should never be used as an uncountable noun (“I would like to eat fewer fruits.” is just as correct). Google “less fruit” and “fewer fruits” and you’ll see that there is no clear answer; there are credible sources that treat “fruit” as both a countable noun (ca.gov) and uncountable noun (cambridge.org).

"We have too much furniture." (uncountable) "We have too many chairs." (countable) "We used to have less furniture." (uncountable) "We used to have fewer chairs." (countable) ----------------------------------------------------------------------------- Uncountable: water stuff money advice proof equipment dust homework fun information ink luck