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For example, gas is countable and uncountable. Then, can 'much gas' always be translated into 'many gases'? Oh, look at that! there's a cloud of many gases!

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    This should answer your question, as 'gas' and 'gases' is the same issue as with 'water' and 'waters'. Water, a water and waters
    – Astralbee
    Dec 21, 2020 at 9:39
  • No, I mean a word that can be countable and uncountable.
    – user126927
    Dec 21, 2020 at 9:42
  • And I want to express uncountable nouns' senses with countable nouns.
    – user126927
    Dec 21, 2020 at 9:44
  • Yes, 'gas' and 'water' can be used the same way. You can say "some gas" or "some water"; you can say "gases" and "waters" and in very specific contexts you can say "a water".
    – Astralbee
    Dec 21, 2020 at 10:27
  • @Astralbee When I use a plural noun, should it mean different types? The answer below says it does.
    – user126927
    Dec 21, 2020 at 10:29

1 Answer 1

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Much gas refers to a large amount, possibly of only one type. Many gases refers to many different types of gas, for example hydrogen, helium, chlorine, nitrogen, water vapour, etc. Both can be correct in different contexts, but they are not interchangeable.

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  • Should it be necessarily different types? or generally?
    – user126927
    Dec 21, 2020 at 10:25
  • I can't think of a situation where you would talk about 2 gases if they were the same type of gas.
    – Peter
    Dec 21, 2020 at 10:35
  • Just imagine a cloud of some gases. The same type.
    – user126927
    Dec 21, 2020 at 10:37
  • Then you wouldn't use the plural.
    – Peter
    Dec 21, 2020 at 10:45
  • But we use 'ashes.' One type.
    – user126927
    Dec 21, 2020 at 10:49

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