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