Here's the completed worksheet with explanations for each answer:
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The Prefix – Un and Dis
Place the prefix – ‘un’ or ‘dis’ in front of the words which are in bold type.
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1. I am _un_able to climb the mountain.
✔ Answer: un
→ “Unable” means *not able*. The prefix
un- is commonly used to negate adjectives like “able,” “happy,” “likely,” etc.
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2. Do not _dis_cover the food.
✔ Answer: dis
→ “Discover” means *to find something previously unknown*. But here, the sentence says “Do not ___cover the food,” implying you should *keep it covered*. So we need the opposite —
“uncover” (to remove cover).
⚠️
Important Correction: This one is tricky! The correct prefix is actually
un-, because “uncover” = to remove the cover.
➡️
Correct Answer: un
*(The word “discover” doesn’t fit contextually — you don’t “discover” food by removing a cover; you uncover it.)*
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3. Pat _dis_likes cheese.
✔ Answer: dis
→ “Dislike” means *not like*. The prefix
dis- is often used with verbs like “like,” “agree,” “approve,” etc., to show the opposite meaning.
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4. Karl will _un_load the truck.
✔ Answer: un
→ “Unload” means *to remove load from*. The prefix
un- reverses the action — “load” → “unload.”
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5. Daddy _dis_infects the counter with bleach.
✔ Answer: dis
→ “Disinfect” means *to remove germs or infection*. The prefix
dis- is used here to mean “remove” or “reverse the state of being infected.”
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6. I _dis_agree with what you said.
✔ Answer: dis
→ “Disagree” means *not agree*. Again,
dis- is used with verbs like “agree,” “believe,” etc., to show opposition.
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7. You are very _un_lucky.
✔ Answer: un
→ “Unlucky” means *not lucky*.
Un- is used with adjectives to express negation.
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8. Timmy is _un_like his father. They are not the same.
✔ Answer: un
→ “Unlike” means *not like* or *different from*. Here, it’s used as an adjective/adverb meaning “not similar.”
*(Note: “dislike” is a verb meaning “not like”; “unlike” is an adjective/adverb meaning “not similar to.”)*
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9. We were _un_satisfied with the service.
✔ Answer: un
→ “Unsatisfied” means *not satisfied*. Again,
un- negates the adjective “satisfied.”
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10. What did you _dis_cover, when you were completing the experiment?
✔ Answer: dis
→ “Discover” means *to find something new or previously unknown*. In scientific experiments, you “discover” results or facts. So
dis- is correct here.
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##
✔ Final Answers:
1.
un
2.
un *(correction: “uncover” — not “discover”)*
3.
dis
4.
un
5.
dis
6.
dis
7.
un
8.
un
9.
un
10.
dis
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## 📝 Key Rules Summary:
- Use
un- to negate adjectives (“unable,” “unlucky,” “unsatisfied”) or reverse actions (“unload,” “uncover”).
- Use
dis- to show opposition or reversal of verbs (“dislike,” “disagree,” “discover,” “disinfect”).
💡 Tip: If the base word is an adjective or noun, try
un- first. If it’s a verb, especially one that implies agreement, belief, or removal, try
dis-.
Let me know if you’d like a printable version or flashcards for practice!
Parent Tip: Review the logic above to help your child master the concept of un prefix worksheet.
