Decoding English: A Comprehensive Guide to Suffix Rules and Examples
Suffixes are a cornerstone of the English language, influencing not only grammar but also writing and reading comprehension. They are letters or groups of letters added to the end of a base word to modify its meaning, conjugation, word type, or grammatical properties such as plurality. Understanding suffix rules is essential for both native speakers and learners of English. Just like people, words have families too: these are groups of related words. The most important family member is the root word. You can also call this the base word. We can make related words by adding prefixes and suffixes to words.
What are Suffixes?
Suffixes are morphological units of language that convey meaning. They appear at the end of a base word or another suffix, altering the meaning of the word to some extent. For example, consider the noun "strength." By adding the suffix "-s," it becomes plural ("strengths"). Adding the suffix "-en" transforms it into a verb ("strengthen"). Suffixes, along with prefixes, form the group known as affixes, which are morphemes attached to a base word to modify its meaning. In English, the most common prefixes and suffixes are typically one or two syllables long, although exceptions like "-ology" (three syllables) exist.
Inflectional vs. Derivational Suffixes
There are two main types of suffixes: inflectional and derivational.
Inflectional Suffixes
Inflectional suffixes serve grammatical purposes. These suffixes include word endings used for verb conjugation, such as "-ing" and "-ed"; additions for nouns, such as the plural "-s"; the possessive "-'s"; and reflexive pronouns such as "-self" and "-selves". Inflectional suffixes deal with grammar, such as verb conjugation or plurality.
Verb Conjugation: Adding "-s" or "-es" to a verb indicates the third person, singular, and present tense.
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- Example: He walks to school.
Pluralization: Adding "-s" to a noun generally denotes plurality.
- Example: My cat is all I need. Ten cats are not enough!
Possession: Adding "-'s" to a singular noun shows ownership or a direct connection.
- Example: The cat's toy.
Derivational Suffixes
Derivational suffixes are used to change word types, such as changing a noun to a verb or an adjective to an adverb. Frequently, you can add different suffixes to the same base word to change its type.
- Example: The adjective 'Secondary' and the adverb 'secondarily'.
Suffix Rules and Spelling Changes
While reading words with suffixes usually doesn’t present a terrible challenge, it can sometimes be a bit tricky knowing how to spell them. That’s where the suffix spelling rules come in handy. Adding a suffix to a word isn’t quite as straightforward. That’s because when you add a suffix, the base word often changes. Thankfully, there are some solid guidelines to follow when adding suffixes to words. The spelling of words can be changed in a number of ways when suffixes are added. There are always exceptions to the rules!
The Change Rule (Words Ending in )
The change rule addresses words that end in
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Pluralization/Verb Tense: If you are adding a suffix to make the word plural or to change the tense of the verb, change the
to an , and then add the -es suffix, not the -s. - Example: cry -> cries; fly -> flies
Suffixes Beginning with "i": If the suffix you are adding begins in an , keep the
to prevent two i’s from appearing back to back. - Example: fly + -ing -> flying
Vowel Teams: Look out for vowel teams, such as
or . In those instances keep the vowel team intact, and simply add on the suffix. - Example: play + -ed -> played; enjoy + -ing -> enjoying
Adjectives ending with -y: For adjectives that end with -y, swap the -y for an -i, and add -ly.
- Example: Merry ends with -y, so swap the -y for an -i and add -ly, to make the adverb merrily.
- Example: Happy ends in a y, so change the y to an i and add -ly.
The Dropping Rule (Silent "e")
When a word ends in a silent "e," drop the "e" before adding a vowel suffix.
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- Example: breeze has a consonant then -e, so drop the -e and add -y, to make the adjective breezy.
- Example: Price and smoke both end with a consonant, and then the letter e, so the e is swapped for the -y suffix.
- Example: Bone ends in a consonant and then e, so drop the e and add -y.
The Doubling Rule (CVC Words)
If the base word has 1 syllable, 1 short vowel, and 1 final consonant, double the final consonant before adding the vowel suffix. When adding suffixes to CVC words, double the last consonant and add -y.
- Example: FOG is a CVC word, so double the -g, and add -y, to make the adjective, foggy.
- Example: Run is also a CVC word, so double the -n and add -y, to make the adjective runny.
- Example: Bag is a CVC word, so double the g and add -y.
Suffixes -y and -ly
Today, we will be learning about the suffixes -y and -ly. The suffix -y usually changes nouns into adjectives. The suffix -ly usually changes adjectives into adverbs.
- Suffix -y: If the noun is a CVC word, double the last letter and add -y.
- Example: FOG is a CVC word, so double the -g, and add -y, to make the adjective, foggy.
- Suffix -y: If the noun ends in a consonant then -e, drop the -e and add -y.
- Example: Breeze has a consonant then -e, so drop the -e and add -y, to make the adjective breezy.
- Suffix -y: If the noun does not end in an -e, or is not a CVC word, just add the -y.
- Example: Wind does not end in an -e, and is not a CVC word, so add y to the end, to make the adjective windy.
- Suffix -ly: If the adjective ends with -y, swap the -y for an -i, and add -ly.
- Example: Merry ends with -y, so swap the -y for an -i and add -ly, to make the adverb merrily.
- Suffix -ly: If the adjective ends with -le, drop the -le and add -ly.Example: For adjectives that end with -le, drop the -le and add -ly.
- Example: Terrible ends with -le, so drop the -le, and add -ly, to make the adverb terribly.
- Example: Flexible ends in le, so drop the le and change for -ly.
- Example: Gentle and docile both end with the letters le, so this is swapped for the -ly suffix.
- Suffix -ly: If the adjective does not end with -y or -le, just add -ly.
- Example: Quick ends in neither -y or -le. so just add -ly, to make the adverb quickly.
Common English Suffixes and Their Functions
Most of the suffixes in English are used to show parts of speech, or word types. Aside from changing the parts of speech, suffixes are used frequently in grammar. Here are some examples of common suffixes:
- -s, -es: Forms plural nouns or third-person singular present tense verbs.
- Examples: books, boxes, he walks, she teaches
- -ed: Forms the past tense of regular verbs.
- Example: walked, played
- -ing: Forms the present participle of verbs (used in continuous tenses).
- Example: walking, playing
- -ly: Forms adverbs from adjectives.
- Example: quickly, happily
- -er, -or: Forms nouns denoting a person who performs an action or has a certain quality; also used for comparative adjectives.
- Examples: teacher, actor, taller
- -est: Forms superlative adjectives.
- Example: tallest
- -tion, -sion, -ment, -ance, -ence: Forms nouns from verbs.
- Examples: action, mission, agreement, acceptance, difference
- -able, -ible: Forms adjectives meaning "able to be."
- Examples: readable, visible
- -ness: Forms nouns from adjectives, indicating a state or quality.
- Example: happiness, sadness
- -ful: Forms adjectives meaning "full of."
- Example: helpful, beautiful
- -less: Forms adjectives meaning "without."
- Example: hopeless, careless
- -ize, -ise: Forms verbs meaning "to make" or "to become."
- Examples: modernize, realize
Suffixes in Grammar
Suffixes play multiple roles in English grammar.
Verb Conjugation
Suffixes are used in the conjugation of regular verbs. Adding -s or -es to a verb shows that it’s third person, singular, and present tense.
- Example: He walks.
Pluralization
The suffix "-s" (or "-es") is commonly added to nouns to indicate plurality. Note, however, that there are irregular plural nouns that use unique spellings for plurality. Just like with verbs, be careful with irregular plural nouns that use unique spellings for plurality.
- Example: cat -> cats
Possession
Possessive nouns show ownership or a direct connection. For most singular nouns, you can show the possessive case by adding the suffix -’s.
- Example: The dog's bone.
Comparative and Superlative Adjectives
Comparative and superlative adjectives also use suffixes.
- Comparative: -er (e.g., taller)
- Superlative: -est (e.g., tallest)
Not all adjectives use these suffixes. Adjectives of two or more syllables use the adverbs more and most instead of adding suffixes.
- Example: more beautiful, most intelligent
Incorporating Suffix Activities into Learning
Early in my teaching career, I struggled to fit in grammar lessons during jam-packed reading blocks. I knew grammar was important, but the time constraints made it challenging. Teaching suffixes can be a bit more challenging than prefixes because of the different spelling rules. When teaching suffixes to 2nd graders, I recommend using a variety of strategies over a one-week span. All my grammar units follow a similar sequence so my students are able to become familiar with the routine. I always start the week with a mini-lesson PowerPoint presentation followed by whole-group practice. On Tuesday, students will practice suffixes with a partner. Inside my week-long suffix unit, you’ll find an easy-to-follow lesson plan that walks you through each day. We all know that students learn differently, which is why I strive to deliver content in as many different ways as possible. Check out the full suffix unit here!
Interactive Activities
PowerPoints are a fantastic tool for teaching suffixes, especially for visual learners. Once students have a basic understanding of what a suffix is, they can move into applying the skill in context. Inside the suffix unit, you’ll find a Grammar Gazette where students can identify the suffixes inside a fun news article. Task Cards are another easy suffix activity that requires little prep. All you have to do is hit print and then cut! These suffix task cards are perfect to be used as a center or as a “roam the room” activity.
Online Games
Online suffix games are always a favorite in my classroom. With the following games, students will forget they are even learning. I promise they are an effective activity to help bring the concept to life!
- Once your students have wrapped up their lessons on prefixes and suffixes, this Fish Game by Education.com is a fantastic way to keep them engaged!
- Wordwall offers a range of free suffix games, but one of my favorites is the straightforward gameshow activity. Similar to Kahoot, this game allows students to play independently. It features 10 questions about suffixes, complete with a timer and a final score. On the right side of the screen, there’s also an option to change the game template.
- Base Word Blaster is an interactive game available for both iPads and computers, letting students use a touchscreen or mouse. It’s a great way to visually see the process of adding and removing a suffix.
Books and Videos
I am a strong believer in using books as a tool to help bring all different topics to life.
- If your kids liked the adventures of the prefixes in Mr. The suffixes work to defend themselves to avoid being tackled after lunch.
- The Word Fun series is a great tool to add to your Grammar library!
- by Brian P. The comical cats are back, but this time with suffixes!
- It’s just under 9-minutes long and explains suffixes in a clear and slow manner.
- This is a fun one to use as a celebration at the end of each grammar lesson!
- After you have finished teaching about root words, prefixes and suffixes, this is a great video to use as a review. If you have a BrainPop Jr.
Tips for Learning Suffixes
Here are some helpful tips for mastering suffixes:
- Focus on one suffix at a time: Try to learn the meaning of the suffix and how it changes the spelling of words. Then, once you feel comfortable with that suffix, move on to another one.
- Practice using new words in sentences: This will help you remember the meaning of the words and how to spell them correctly.
- Ask for help: Don’t be afraid to ask for help if you’re having trouble understanding something.
- Pay attention to exceptions: Be aware that there are exceptions to the rules.
- Notice suffixes in everyday reading: This will help you to become more familiar with them.
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