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