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