Nouns ending in -s, -x, -z, -ch, or -sh add -es to form the plural. This makes the word easier to pronounce.
Fourths is regular. It follows the -es Addition rule.
Use plural verbs: "The fourthses are ready" (not "is ready").
Yes. The plural fourthses is standard across all English variants.
The word fourths follows the standard English pluralization rule. When forming the plural, fourths becomes fourthses. This follows the -es Addition pattern, which is one of the most common plural rules in English.
Understanding why fourths becomes fourthses helps with spelling and pronunciation. Nouns ending in -s, -x, -z, -ch, or -sh add -es to form the plural. This makes the word easier to pronounce.
When using fourthses in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The fourthses are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.