Let's solve this worksheet step by step. The goal is to
choose the correct prefix from the list:
fore-, pre-, re-, un-, dis-, mis-, sub-
to complete each word in the sentence.
---
1. Mom had to ____ heat the oven to 350° to bake the cake.
- We need a prefix that means "before" or "in advance."
-
pre- means "before"
-
preheat = to heat in advance
✔ Answer: pre
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2. To help keep the Earth clean, we ____ cycle all of our plastic.
- We want to use the word "recycle" — meaning to process used materials again.
-
re- means "again"
✔ Answer: re
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3. I looked over my writing and found a ____ spelled word.
- We’re looking for a word like "misspelled" — meaning incorrectly spelled.
-
mis- means "wrongly" or "incorrectly"
✔ Answer: mis
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4. Before you take off your shoes, you need to ____ tie them.
- We need to "untie" the shoes before removing them.
-
un- means "not" or "reverse"
✔ Answer: un
---
5. You may be correct, but I ____ agree with you.
- This means "I do not agree."
-
dis- means "not" or "opposite"
- "disagree" = not agree
✔ Answer: dis
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6. We checked the ____ cast before we planned the event.
- We need a word like "forecast" — meaning prediction of future weather.
-
fore- means "before" or "in advance"
✔ Answer: fore
---
7. The big, gray ____ marine plunged down into the water.
- "Submarine" = under the water
-
sub- means "under"
✔ Answer: sub
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8. If you want to be ready for something, you need to ____ pare.
- We need "prepare" — to get ready in advance.
-
pre- means "before"
✔ Answer: pre
---
9. Make sure you ____ turn the library book on time!
- "Return" = give back
-
re- means "back" or "again"
✔ Answer: re
---
10. I try to be careful but sometimes I make a ____ take.
- "Mistake" = error
-
mis- means "wrongly"
✔ Answer: mis
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✔ Final Answers:
1.
pre
2.
re
3.
mis
4.
un
5.
dis
6.
fore
7.
sub
8.
pre
9.
re
10.
mis
---
Bonus: Write a sentence using a prefix with a root word.
Let’s pick
"re-" + "write" = rewrite
👉
Sentence: I had to rewrite my essay because I made too many mistakes.
Or another example:
👉
"un-" + "happy" = unhappy
"I was unhappy with my grade."
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✔ Summary:
The prefixes and their meanings:
-
pre- = before
-
re- = again, back
-
un- = not, reverse
-
dis- = not, opposite
-
mis- = wrongly
-
sub- = under
-
fore- = before (often used in older or formal words)
This exercise helps students understand how prefixes change the meaning of root words.
Let me know if you'd like a printable version or more practice!
Parent Tip: Review the logic above to help your child master the concept of prefix worksheet 8th grade.
