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