Second Grade English: Inflectional Endings (-s, -es, -ed, -ing)
Words in the English language are flexible tools that change their shapes to match time and quantity. The special suffixes that adjust a word's grammatical tense, number, or state without changing its core definition are called inflectional endings. Adding -s or -es tells a reader how many objects you are discussing, while adding -ed or -ing reveals exactly when an action occurs. In this chapter, you will master the four primary inflectional endings: -s, -es, -ed, and -ing, learning the exact spelling mechanics required when attaching them to base words.
The Two Families of Inflectional Endings
Inflectional endings divide into two main functional categories: number markers for nouns and time markers for verbs.
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| INFLECTIONAL ENDINGS CATEGORIES |
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| 1. NUMBER MARKERS (Plurals for Nouns): |
| -s --> One cat becomes two cats |
| -es --> One box becomes two boxes |
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| 2. TIME & TENSE MARKERS (Verbs): |
| -ed --> Past Action (Happened yesterday): "We walked." |
| -ing --> Ongoing Action (Happening right now): "Walking." |
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Preserving the Core Meaning
Unlike prefixes like un-, which flip a word into its opposite, inflectional endings do not change the underlying meaning of a word. A dog and dogs are the exact same kind of furry animal; walked and walking are the exact same physical movement. Inflectional endings simply tune the word so it fits smoothly into the sentence structure.
Number Endings: Choosing Between -s and -es
Most nouns simply add -s to become plural, but nouns that end in specific hissing or buzzing sounds require -es so your mouth can pronounce the extra syllable comfortably.
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| THE -ES PLURAL SPELLING RULE |
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| If a base word ends in: Add: Why? |
| [ s, x, z, ch, or sh ] -es Creates an extra /ɪz/ sound |
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| Examples: |
| bus + -es = buses wish + -es = wishes |
| box + -es = boxes bench + -es = benches |
| buzz + -es = buzzes |
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Try the Hissing Sound Test
Try saying the word box with just an s at the end: "boxs." Your tongue gets hopelessly tangled trying to make two hissing sounds in a row! Adding -es provides a tiny vowel cushion that makes the plural sound clear and pleasant: /bɒks-ɪz/.
Time Endings: The Secrets of -ed and -ing
When verbs describe actions, inflectional endings signal whether the action belongs to the past or is unfolding right this second.
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| TIME ENDING TRANSFORMATION RULES |
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| Base Word Type | Adding -ed (Past) | Adding -ing (Present)|
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| Regular Base | jump -> jumped | jump -> jumping |
| Silent E Base | bake -> baked (drop e) | bake -> baking (drop e)
| Short CVC Base | hop -> hopped (double)| hop -> hopping (double)
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The Three Sounds of -ed
When reading aloud, pay close attention to the past-tense ending -ed. It can make three completely different sounds depending on the final sound of the base word:
1. It sounds like /t/ in words like jumped (/dʒʌmpt/) and walked.
2. It sounds like /d/ in words like played (/pleɪd/) and rained.
3. It creates a brand-new syllable sounding like /ɪd/ in words that end in t or d, such as landed and started!
The Drop E Rule for -ing and -ed
When a base word ends in silent 'e', you must drop that 'e' before adding -ed or -ing. In smile, drop the 'e' to write smiling and smiled. You never write two e's in a row for these words!
The CVC Doubling Rule (1-1-1 Rule)
If a word has 1 syllable, 1 short vowel, and ends in 1 consonant (like stop or run), double the final consonant before adding -ed or -ing: stopped, stopping, running. This prevents the vowel from turning into a long vowel!
Practice Exercises
Exercise 1: Add either -s or -es to make each of the following nouns plural: glass, peach, bird, fox, plant.
Exercise 2: Write the past tense (-ed) and present continuous (-ing) forms for each base verb, applying the correct spelling rules: bake, clap, jump.
Exercise Solutions
Solution to Exercise 1: The plural forms are glasses (ends in s, add -es), peaches (ends in ch, add -es), birds (regular, add -s), foxes (ends in x, add -es), and plants (regular, add -s).
Solution to Exercise 2: For bake: baked (drop silent e) and baking (drop silent e). For clap: clapped (double consonant p) and clapping (double consonant p). For jump: jumped (regular base) and jumping (regular base).