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Educational worksheet teaching the rule of changing 'y' to 'i' in words when adding suffixes.

A worksheet titled "Change Y to I: Yes or No?" with instructions to determine if the letter 'y' should be changed to 'i' when adding suffixes like -er, -es, or -s, featuring words such as funny, baby, happy, play, lazy, lady, enemy, fly, key, story, body, and try.

A worksheet titled "Change Y to I: Yes or No?" with instructions to determine if the letter 'y' should be changed to 'i' when adding suffixes like -er, -es, or -s, featuring words such as funny, baby, happy, play, lazy, lady, enemy, fly, key, story, body, and try.

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Show Answer Key & Explanations Step-by-step solution for: Inflectional Endings and Suffixes - Change Y to I Rule - Yes or No Worksheet
Let’s go through each word one by one. The rule is:
If a word ends in “y” and the letter before the “y” is a consonant, change the “y” to “i” when adding an ending (like -er, -es, -s).
If the letter before the “y” is a vowel (a, e, i, o, u), then you do NOT change the “y” — just add the ending.

We’ll check each word:

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1. funny + -er
- Ends in “y”, letter before “y” is “n” → consonant → YES, change y to i
- funny → funnier
Yes | Write: funnier

2. baby + -es
- Ends in “y”, letter before “y” is “b” → consonant → YES, change y to i
- baby → babies
Yes | Write: babies

3. happy + -er
- Ends in “y”, letter before “y” is “p” → consonant → YES, change y to i
- happy → happier
Yes | Write: happier

4. play + -er
- Ends in “y”, letter before “y” is “a” → vowel → NO, don’t change y
- play → player
No | Write: player

5. lazy + -er
- Ends in “y”, letter before “y” is “z” → consonant → YES, change y to i
- lazy → lazier
Yes | Write: lazier

6. lady + -es
- Ends in “y”, letter before “y” is “d” → consonant → YES, change y to i
- lady → ladies
Yes | Write: ladies

7. enemy + -es
- Ends in “y”, letter before “y” is “m” → consonant → YES, change y to i
- enemy → enemies
Yes | Write: enemies

8. fly + -er
- Ends in “y”, letter before “y” is “l” → consonant → YES, change y to i
- fly → flier (or flyer — but according to this rule, we change it)
⚠️ Note: In real life, both “flier” and “flyer” are accepted, but for this worksheet, since “l” is a consonant, we follow the rule → change y to i
Yes | Write: flier

9. key + -s
- Ends in “y”, letter before “y” is “e” → vowel → NO, don’t change y
- key → keys
No | Write: keys

10. story + -es
- Ends in “y”, letter before “y” is “r” → consonant → YES, change y to i
- story → stories
Yes | Write: stories

11. body + -es
- Ends in “y”, letter before “y” is “d” → consonant → YES, change y to i
- body → bodies
Yes | Write: bodies

12. try + -es
- Ends in “y”, letter before “y” is “r” → consonant → YES, change y to i
- try → tries
Yes | Write: tries

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Final Answer:

| Word | Y to I? | Correct Spelling |
|----------|---------|------------------|
| funny | Yes | funnier |
| baby | Yes | babies |
| happy | Yes | happier |
| play | No | player |
| lazy | Yes | lazier |
| lady | Yes | ladies |
| enemy | Yes | enemies |
| fly | Yes | flier |
| key | No | keys |
| story | Yes | stories |
| body | Yes | bodies |
| try | Yes | tries |
Parent Tip: Review the logic above to help your child master the concept of changing y to i worksheet.
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