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