1. Write a noun in the singular and plural forms. Underline the endings: bench, sandwich, peach, toy, key, class.

bench — benches; sandwich — sandwiches; peach — peaches; toy — toys; key — keys; class — classes.

The plural ending is -es after sibilant sounds and -s after vowels and most other consonants. In “toy” and “key,” the y follows a vowel, so the ending is -s.