Spelling Coach - Raphael's Fun Spelling Tips & Tricks

We usually change y to i before adding an s or a suffix when a consonant comes before the y. Examples:

courtesy + s = courtesies
worry + some =worrisome
family + s = families
likely + hood = likelihood

Proper names are an exception to this rule:

Germanys, Kennys

We usually do not change y to i when a vowel comes before the y. Examples:

chimney + s = chimneys
boy + s = boys

We also do not change y to an i when the suffix begins with an i. Examples:

bully + ing = bullying