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Unit 9: Adding suffixes: the spelling rules

Page 12 of 19

Unit 9: Suffixes: why we need to double letters, change them or drop 'e'

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Page 12 of 19

The Spelling Rules for Adding Suffixes:

When do you change the letter y ?
When does the y stay the same ?

Teaching point - learning to spell Sometimes you need to change the letter y.

All these words end in y. The y here is used as a vowel:

cry copy crazy beauty silly

When adding a suffix to a word ending y, we usually change the y to i:

word lists word lists
cry + ed = cried copy + er = copier crazy + est = craziest

beauty + ful = beautiful

silly + ness = silliness
word lists word lists

If the suffix is s, we change the y to i and then add es:

word lists word lists
cry + s = cries copy + s = copies party + s = parties
word lists word lists

Learn the Words:
Study this word list 'Look, Say, Cover, Write, Check' spelling exercise English spelling games spelling test

Let’s get you used to changing the y. Have a go with these words:

Add the suffix to the root word.

Type the whole word:

fry + ed
dirty + er
curry + s
marry + ed
funny + est
lazy + ness
plenty + ful
try + s
easy + ly
supply + ed
happy + er
pretty + est


Skip this exercise and go to the next part of this unit: Rule-breakers for y words. *

* Skip link not available for logged in students.

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