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ELA
Grade 3-7
Prefixes, Suffixes & Base Words Cheat Sheet
A printable reference covering prefixes, suffixes, base words, root meanings, word-building patterns, and spelling changes for grades 3-7.
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Prefixes, suffixes, and base words help students break long words into meaningful parts. This cheat sheet shows how word parts fit together so students can read, spell, and understand unfamiliar words. It is useful for vocabulary, reading comprehension, spelling, and writing. Students in grades 3-7 can use it as a quick reference when decoding or building words.
Key Facts
- A prefix is added to the beginning of a base word, as in re + read = reread.
- A suffix is added to the end of a base word, as in help + ful = helpful.
- A base word can stand alone and has meaning, as in play, kind, or pack.
- The word pattern prefix + base word + suffix can build longer words, as in un + help + ful = unhelpful.
- The prefix un- usually means not or opposite of, as in unhappy means not happy.
- The prefix re- usually means again, as in rewrite means write again.
- The suffix -less usually means without, as in fearless means without fear.
- When adding a suffix that begins with a vowel, a final silent e is often dropped, as in hope + ing = hoping.
Vocabulary
- Prefix
- A prefix is a word part added to the beginning of a word to change its meaning.
- Suffix
- A suffix is a word part added to the end of a word to change its meaning or grammar.
- Base word
- A base word is a word that can stand alone and can have prefixes or suffixes added to it.
- Root
- A root is the main word part that carries the basic meaning, but it may not always stand alone.
- Affix
- An affix is a word part added to a base word or root, including both prefixes and suffixes.
- Word family
- A word family is a group of related words built from the same base word or root.
Common Mistakes to Avoid
- Treating every beginning letter group as a prefix is wrong because not all word beginnings are meaningful word parts, such as the pre in pretty.
- Changing the base word meaning incorrectly is wrong because a prefix has a specific meaning, such as mis- meaning wrongly or badly, not again.
- Forgetting spelling changes before adding suffixes is wrong because words like make + ing become making, not makeing.
- Confusing base words and roots is wrong because a base word can stand alone, while some roots need other word parts to form a complete word.
- Adding a prefix and changing the spelling of the base word is often wrong because most prefixes attach without changing the base, as in dis + agree = disagree.
Practice Questions
- 1 How many word parts are in unkindness, and what are they?
- 2 Build a word using re- + play + -ed, then write its meaning.
- 3 Split the word careless into its base word and suffix, then explain what the suffix means.
- 4 Why can knowing the prefix mis- help you understand the word misplace even if you have not seen it before?