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