"Fish write books."

[ybs19]

Why isn't ''Balık kitap yazar.'' accepted?

[evren52]

The verb without "-s" refers to a plural subject.If "fish" was singular here,there would be "writeS" instead of "write"

[ybs19]

Oh,now I see it,thanks! :)

[insignium]

how can we know whether the word fish is pularl or singular both answers must have been accepted. "balık kitaplar yazar"

[AlexinNotTurkey]

That is just wrong in Turkish, or at best very, very unnatural. General direct objects do not take the plural suffix. :)