Year 3 · English
Use prefixes and suffixes in Year 3 English
Start here
Focus on prefixes and suffixes year 3 spelling rules. Open support for “Know Your Suffixes: -able”, then explain the idea in your own words.
Understand the key idea
A prefix is added to the start of a word, as in happy and unhappy. A suffix is added to the end, as in quick and quickly. Comparing the root with the longer word helps you see what was added and whether the spelling changed.
What suffixes are taught in Year 3?
A suffix is a group of letters added to the end of a root word. Common Year 3 work includes endings such as -ness, -ful, -less, -ly, -ment and -ation, alongside verb endings such as -ed and -ing. The suffix can change meaning or word class: happy becomes happiness, care becomes careful or careless, and excite becomes excitement.
A prefix is added to the beginning instead. Prefixes such as un-, dis-, mis-, re- and super- often change meaning while leaving the root visible. Asking children to box the prefix or suffix and underline the root helps them decode and spell longer words.
Spelling changes to watch
The root does not always stay unchanged. A final consonant may double before a vowel suffix, as in forget and forgetting. A final e may be removed before -ing, as in hope and hoping. A consonant followed by y often changes to i before some suffixes, as in happy and happiness, but the y stays before -ing, as in copying.
Instead of learning each long word separately, compare related word families and say which rule applies. This builds a reusable spelling strategy and makes dictionary checking more purposeful.
Common mix-up
Adding a suffix sometimes changes the spelling of the root. A final y after a consonant often changes to i before a suffix such as -ness: happy becomes happiness. Check the suffix and any exception before applying the pattern.
Try this first
- Take one root word and build as many versions of it as you can.
- Underline the root inside a long word before trying to read or spell it.
- Sort words into those where the root stayed the same and those where it changed.
Ask: Which part is the root word, and which prefix or suffix has been added?
Curriculum check: National curriculum: English programmes of study
Year 3 learners practise prefixes and suffixes year 3 spelling rules.
The activities include Know Your Suffixes: -able, Know Your Suffixes: -ly, Pluralise Nouns Ending in -f or -fe, and related practice. The checked support below includes video, teaching, worksheet, practice. Open a resource in its provider's website and choose the format that best helps the learner explain the idea independently.
Activities covered
Finish one activity, then tap Done to earn one Den Drop ticket. You can earn up to 3 tickets each day.
- Know Your Suffixes: -able — support from YouTube — Twinkl Educational Publishing
- Know Your Suffixes: -ly — support from Oak National Academy
- Pluralise Nouns Ending in -f or -fe — support from YouTube — Rocket Spelling
- Spell Tricky Words Using the Suffix -ous — support from YouTube — Twinkl
- Understand Prefixes: Anti- and Co- — support from Oak National Academy
- Use the Prefix auto- — support from Oak National Academy
- Use the Prefixes in-, il-, ir- — support from Oak National Academy
- Use the Prefixes in- and im- — support from Oak National Academy
- Use the Prefixes inter- and re- — support from Oak National Academy
- Use the Prefixes mis- and dis- — support from Oak National Academy
- Use the Prefixes sub- and super- — support from Oak National Academy
- Use the Suffix -ation — support from YouTube — Twinkl
- Use the Suffix -ous — support from YouTube — Twinkl
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Watch it explained
watch a video explanation
How Do You Spell Words Ending in -able, -ible, -ably and -ibly? | KS2 English Concept for Kids
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The Suffix -ly
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Plurals with -y to -ies, -f to -ves (8-2: Rocket Spelling)
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How Do You Use the Suffix -ous?
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Prefixes re-, sub-, inter-, super-, anti-, auto- and co-
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Prefixes in-, im-, ir- and il-
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Prefixes un-, dis- and mis-
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Spelling Words with the Suffix -ation
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Learn it properly
lessons and teaching pages
Prefixes and Suffixes
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Suffixes: -y and -ly
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Plural Nouns: Regular and Irregular
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Spelling words with the prefixes de-, re-, sub-, super-, inter-, anti- and auto-
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Spelling words with the prefixes co-, pre-, pro- and sus-
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Spelling words with the prefixes meaning 'not'
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Spelling words with the prefixes dis-, non-, mis- and un-
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Practise it
questions and activities to try
Plural Nouns English Grammar Quiz
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Print and finish
worksheets away from the screen
Year 3/4 -ly Spelling Activity
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PlanIt Y3 -ly Adverbs
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Adding the Suffix -ous Spelling Pack
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PlanIt Y3 Prefixes super-, anti- and auto-
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Prefixes re-, sub- and inter- Worksheets
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PlanIt Y3 Prefix in-
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PlanIt Y3 Prefixes re-, sub- and inter-
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PlanIt Y3 Prefixes dis-, mis- and un-
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PlanIt Y3 Suffix -ation
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