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.