English splits nouns into two groups, and the split is not always logical. Some words that feel countable simply are not.

The basic split

  • Countable — you can put a number in front: one book, three chairs, five ideas
  • Uncountable — you cannot: water, rice, music, information

The words learners get wrong most

These are uncountable in English, and have no plural form:

  • advice — not "advices". Say "some advice" or "a piece of advice"
  • information — not "informations"
  • furniture — not "furnitures". Say "a piece of furniture"
  • equipment, luggage, homework, research, feedback, news

"News" looks plural but takes a singular verb: "The news is good."

How to count uncountable things

Use a container or unit word:

  • a piece of advice
  • a bottle of water
  • a slice of bread
  • a bit of information

much, many, some

  • many + countable: "many books"
  • much + uncountable: "much water"
  • some + either: "some books", "some water"
  • a lot of + either — which is why it is the safe default in speech

Words that switch

Some nouns work both ways with different meanings:

  • "I'd like coffee" (the substance) / "Two coffees, please" (two cups)
  • "She has experience" (skill) / "It was an experience" (an event)
When unsure in conversation, "a lot of" works with everything and buys you time to think.