This noun follows the standard English plural rule: simply add -s to the singular form.
First is regular. It follows the Standard -s rule.
Use plural verbs: "The firsts are ready" (not "is ready").
Yes. The plural firsts is standard across all English variants.
The word first follows the standard English pluralization rule. When forming the plural, first becomes firsts. This follows the Standard -s pattern, which is one of the most common plural rules in English.
Understanding why first becomes firsts helps with spelling and pronunciation. This noun follows the standard English plural rule: simply add -s to the singular form.
When using firsts in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The firsts are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.