# 4.2: When It's -s and When It's -es

Difficulty Level: At Grade Created by: CK-12

## When It's -s and When It's -es

1. In the last lesson you found these two groups of singular nouns:

Sort these twelve singular nouns into this matrix. Remember that the letter <x> at the end of words spells the combination of sounds [ks]. When you get done, two of the squares should still be empty:

2. When you want to refer to more than one of something with a singular noun that ends in the sounds ______, ______, ______, or _____, you add -es.

3. Now you can write a more useful rule for choosing -s and -es: When you want to refer to more than one of something with a noun that ends in the sounds _____, _____, _____, or ______, you add -es, but with most other nouns you add ________.

Word Changes

1. Write the word catch in the blank: ... _________
2. Add the suffix that means “more than one”: ... _________
3. Change the \begin{align*}<\text{s}>\end{align*} to the letter that comes right in front of it in the alphabet: ... _________
4. Change the first letter of the word to <w> and change the last letter to \begin{align*}<\text{s}>\end{align*}: ... _________
5. Change the first vowel in the word to <l>: ... _________
6. Change the first letter in the word to the letter that comes between <o> and <q> in the alphabet and change the \begin{align*}<\text{s}>\end{align*} back to <r>: ... _________
7. Add the suffix that means “more than one”: ... ________
8. Take away the \begin{align*}<\text{p}>\end{align*} and the <t>. Then move the <r> up to the front of the word: ... ________
9. Change the last letter of the word back to an <r>: ... _________

Riddle: A baseball player who makes a lot of money might be called a \begin{align*}\frac{}{\text{Word} \ \#9} \ \frac{}{\text{Word} \ \#6}.\end{align*}

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