In English, the plural form of words ending in -us, especially those derived from Latin, often replaces -us with -i. There are many exceptions, some because. A singular noun ending in s, x, z, ch, sh makes the plural by adding-es. They are not used in the singular, or they have a different meaning in the. If the noun ends with -ch, -s, -sh, -x, or -z, add -es to form the plural: plural forms – these are typically the names for various kinds of pasta. There are many different rules regarding pluralization depending on what letter a noun ends in. Irregular nouns do not follow plural noun rules, so they must be. Preference for Latin or English plural endings is inconsistent in similarly words or in which contexts various alternative forms are employed. Although we add -s to change most singular nouns to plural nouns, there are many nouns that have a different ending in the plural. Knowing when to use an '-s' or an '-es' on a plural can be hard and frustrating. if the noun ends in -s, -x, -z, -sh, or -ch (with the exception—see. What are irregular plural nouns, and how can you remember them? all words except words that end in -ch, -sh, -s, -ss, -x, -z, and -o. We use these and those with plural nouns: (these + plural noun). I need to paint those windows This is preferred to the possessive X's one/X's ones. If the singular noun ends in -s, -x or -z, no further -s is added in the plural. un fils, a son. des fils, sons. une voix, a.