Determiner all + uncountable noun – which of the following sentences is correct?

All water has been filtered.


All water have been filtered.


I’ve already searched about this especially in youtube. From what I learned, if it’s an uncountable noun after determiner all, it will be treated as singular therefore has should be used.

I just need a confirmation that’s why I posted a question here.


Uncountable nouns are treated as singular:

All water is wet.

All the sand has been delivered for the playground.

All life is precious.

Source : Link , Question Author : Karlo Kokkak , Answer Author : The Photon

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