Grammar Plural of Nouns   Nouns ending with -y preceded by vowel   Singular Plural Examples - Singular Examples - Plural Boy Boys She saw the boy running to catch her black ball Those boys were playing soccer with their friends yesterday Day Days I was very happy that day when you visited me She worked 7 days last week and she is very exhausted now Guy Guys He studied with that guy and they were big friends I drank a beer last night with these guys. They are my best friends Holiday Holidays Last holiday he broke his leg when he was playing soccer I wanted to spend my holidays with you but I had to work and study Key Keys The woman opened the door with her key She copied her keys for her husband because he lost his keys Monkey Monkeys That monkey spent its time sleeping and eating on the tree The monkeys in the zoo ate all the food very quick  Way Ways I lost my way home and now I don´t know how to go back I knew different ways to go home but I don´t remember anymore     Globalized English School English in English   2009 - 2010 Globalized English School  - All rights reserved