Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
Factory is regular. It follows the -ies Conversion rule.
Use plural verbs: "The factories are ready" (not "is ready").
Yes. The plural factories is standard across all English variants.
The word factory follows the standard English pluralization rule. When forming the plural, factory becomes factories. This follows the -ies Conversion pattern, which is one of the most common plural rules in English.
Understanding why factory becomes factories helps with spelling and pronunciation. Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
When using factories in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The factories are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.