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# 4.7: More About Suffixes and < y > to < i > Changes

Difficulty Level: At Grade Created by: CK-12

## More About Suffixes and <y> to <i>\begin{align*}<\mathrm{i}>\end{align*} Changes

1. Here is another chance for you to try out your new rule for spelling plural nouns. Add either s\begin{align*}-s\end{align*} or -es to each singular noun. Be sure to show any changes:

Singular Noun + Suffix = Plural Noun
ability\begin{align*}\cancel{y}\end{align*}+ i + es = abilities
dance + s = dances
six + es = sixes
yesterday + s = yesterdays
memory\begin{align*}\cancel{\mathrm{y}}\end{align*}+ i + es = memories
demand + s = demands
match + es = matches
Wednesday + s = Wednesdays
family\begin{align*}\cancel{\mathrm{y}}\end{align*} + i + es = families
design + s = designs
crush + es = crushes
library\begin{align*}\cancel{\mathrm{y}}\end{align*}+ i + es = libraries
beauty\begin{align*}\cancel{y}\end{align*}+ i + es = beauties
pattern + s = patterns
success + es = successes
attorney + s = attorneys

2. You've seen that <y> changes to <i>\begin{align*}<\mathrm{i}>\end{align*} when you add the suffix -es to singular nouns that end in a <y> with a consonant right in front of it. A <y> with a consonant in front of it changes to <i>\begin{align*}<\mathrm{i}>\end{align*} also when you add the suffixes -ed or -er or -est.

3. Watch for all kinds of changes when you combine the following words and suffixes to make new words:

Word' + Suffix = New Word
supply\begin{align*}\cancel{y}\end{align*} + i + er = supplier
bottle\begin{align*}\cancel{e}\end{align*} + ed = bottled
arrive\begin{align*}\cancel{e}\end{align*} + ing = arriving
stop + p + er = stopper
white\begin{align*}\cancel{e}\end{align*} + est = whitest
like\begin{align*}\cancel{e}\end{align*} + ed = liked
try\begin{align*}\cancel{\mathrm{y}}\end{align*} + i + ed = tried
use\begin{align*}\cancel{e}\end{align*} + er = user
bat + t + ing = batting
surprise\begin{align*}\cancel{e}\end{align*} + ed = surprised

4. Here are some to do the other way round:

Word = Shorter Word + Suffix
dancer = dance\begin{align*}\cancel{e}\end{align*} + er
supplied = supply\begin{align*}\cancel{y}\end{align*} + i + ed
waltzing = waltz + ing
arrived = arrive\begin{align*}\cancel{e}\end{align*} + ed
designer = design + ed
silier = silly\begin{align*}\cancel{y}\end{align*} + i + er
phoning = phone\begin{align*}\cancel{e}\end{align*} + ing
writer = write\begin{align*}\cancel{e}\end{align*} + er
guessing = guess + ing
pitcher = pitch + er

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