On 5 Nov 2019, Wols Lists spake thusly: > On 05/11/19 12:44, Coly Li wrote: >>>> are devices number before and after the grow operation, "* 2" comes >>> > >>> > device numbers >> Copied. I am not sure whether it should be "device numbers" or maybe >> "devices numbers", this confuses me *^_^* >> > It is "device numbers". > > The trick for English is to ask yourself what is the singular form. Here > it is "device number". Then convert that to plural by adding an "s" at > the end. > > English never "doubles up" as far as I'm aware (and I bet someone comes > up with an obscure example where it does :-) Doubling up, I'm not sure of, but pluralizing an unexpected word can happen. Borrowed noun phrases from other languages that have adjectives following nouns are one case I can think of. e.g. A court martial -> two courts martial. But frankly even most native English speakers get this wrong, so you could well consider this to be an example of 19th-century grammatical pettifoggery that doesn't actually resemble the grammar encoded inside native speakers' brains ("court martials" doesn't sound that wrong to *me*, sorry 19th-century grammarians). > (My exception? "never", and "not ever" are the same. They are similar, but 'not ever' is often more emphatic. :)