English special singular to plural Homomorphism of simple and complex numbers Plural noun to plural
1) For singular nouns, add s: students, apples, bags, trees, books, brothers. 2) for nouns ending with s, x, SH, CH, add es: glasses, boxes, brushes, matches. 3) for nouns ending with consonant letter and y, change y to I, add es: Cities, babies, enemies. 4) for nouns ending with f or Fe, change y to I, add es: cities, babies, enemies