Here are the completed spelling rules:
- To make the plural of most nouns we add s.
- If the noun ends in -s, -sh, -ch, -z, or -x, we add es.
- If the noun ends in -o, we add s or sometimes es.
- If the noun ends in a consonant + -y, we change y to ies.
- If the noun ends in a vowel + y, we add s.
- If the noun ends in -f or -fe, we change -f or -fe to ves.