The 'y' rule
In a nutshell
The 'y' rule is used when adding suffixes to a root word that ends in 'y'. In this summary, you will learn this rule and how to put it to use.
The 'y' rule
If the word ends in a 'y', you will change the 'y' to an 'i' before adding the suffix.
Example
Original word | Word+suffix |
happy | happiness |
sleepy | sleepiness |
Suffixes -est, -er, -ed
When adding the suffixes -est, -er and -ed, you have to first change the 'y' to 'i'.
Example
original word | word+suffix |
sunny | sunniest |
merry | merrier |
worry | worried |
Exceptions
There are two main exceptions to the 'y' rule.
If the 'y' is proceeded by a vowel
If a word ends in a 'y', but the letter right before the 'y' is a vowel, you must keep the 'y'.
Example
Original word | Word+suffix |
play | player |
joy | joyful |
Suffix -ing
If a word ends in a 'y' and you want to the suffix -ing, you must keep the 'y' and not change it to an 'i'.
Example
Original word | Word+suffix |
cry | crying
|
employ | employing |