Prefixes worksheet for learning "dis-", "non-", and "un-" with interactive exercises.

Let's solve this worksheet step by step.

---

Understanding the Task

The worksheet focuses on prefixes: *dis-*, *non-*, and *un-*, all of which mean "not" or "the opposite of."

We are to:
1. Add one of these prefixes to base words to form new words.
2. Use those new words to complete sentences.

---

## Part A: Add the correct prefix (dis-, non-, un-) to each base word

We'll go through each word and choose the most appropriate prefix based on meaning and common usage.

1. zip → unzip
*(To open a zipper; "un-" means reverse the action)*

2. honest → dishonest
*(Opposite of honest; "dis-" is used here, as in "disloyal")*

3. fat → non-fat
*(Common term for food with no fat; "non-" is standard here)*

4. agree → disagree
*(Opposite of agree; "dis-" is used for negation of actions)*

5. ripe → unripe
*(Not ripe; "un-" is commonly used for states like this)*

6. pleasant → unpleasant
*(Not pleasant; "un-" is standard here)*

7. stop → disstop? ✘
Wait — "disstop" is not a real word.
But "unstop" is not common either.
Actually, we need "unstop"? No — better choice: "disapprove" was an example, but "stop" doesn't typically take *dis-*.

Let’s reconsider: The best fit is "unstop" — but it's not commonly used.

However, "non-stop" is a common compound word meaning "continuous." So:

→ non-stop ✔
*(Note: "non-stop" is a compound adjective, not a verb, but it fits the pattern)*

But wait — the instruction says "add the prefix to the front of each base word to make a new word."
"Non-stop" is acceptable, though it's hyphenated.

Alternatively, perhaps the intended answer is "unstop", but that's not standard.

But actually, "unstop" isn't a valid word. So likely, the intended answer is non-stop.

✔ non-stop

8. respect → disrespect
*(Opposite of respect; "dis-" is standard here)*

9. fair → unfair
*(Not fair; "un-" is standard)*

10. obey → disobey
*(Opposite of obey; "dis-" is used here)*

---

✔ Final Answers for Part A:

| # | Base Word | New Word |
|---|-------------|----------------|
| 1 | zip | unzip |
| 2 | honest | dishonest |
| 3 | fat | non-fat |
| 4 | agree | disagree |
| 5 | ripe | unripe |
| 6 | pleasant | unpleasant |
| 7 | stop | non-stop |
| 8 | respect | disrespect |
| 9 | fair | unfair |
|10 | obey | disobey |

> Note: For #7 ("stop"), "non-stop" is the most logical and commonly used word. Although "unstop" isn’t a real word, "non-stop" is idiomatic.

---

## Part B: Use the words you made above to complete each sentence

Now, use the words from Part A to fill in the blanks.

1. Haley knew it was ________ to copy her sister's homework.
→ She knows it's wrong. So, dishonest ✔
✔️ dishonest

2. Luke could not ________ his jacket.
→ He couldn't open it. So, unzip ✔
✔️ unzip

3. Claire ate some ________ yogurt before going for a run.
→ Non-fat yogurt is common for health.
✔️ non-fat

4. Gloria did not tolerate ________ from anyone.
→ She won't accept disrespect.
✔️ disrespect

5. Phil worked ________ on his project.
→ Continuous effort — "non-stop" fits perfectly.
✔️ non-stop

6. Cameron and Mitchell ________ about everything.
→ They don't agree. So, disagree ✔
✔️ disagree

7. Jay had an ________ time at the party.
→ Not a good time → unpleasant ✔
✔️ unpleasant

8. Manny would never ________ his mother.
→ Never disobey → disobey ✔
✔️ disobey

9. Lily ate the banana even though it was still ________.
→ Not ripe → unripe ✔
✔️ unripe

10. Alex felt her teacher was being ________.
→ Unfair treatment → unfair ✔
✔️ unfair

---

✔ Final Answers for Part B:

1. dishonest
2. unzip
3. non-fat
4. disrespect
5. non-stop
6. disagree
7. unpleasant
8. disobey
9. unripe
10. unfair

---

🔍 Summary of Key Concepts:

- Prefixes: *dis-*, *non-*, *un-* all mean "not" or "opposite."
- Dis- often used with verbs and abstract nouns: *disagree, disrespect, dishonest*
- Un- used with adjectives and adverbs: *unhappy, unfair, unripe*
- Non- used with nouns and adjectives, especially in formal or scientific terms: *non-toxic, non-stop, non-fat*

---

✔ Final Answer Sheet:

#### Part A:
1. unzip
2. dishonest
3. non-fat
4. disagree
5. unripe
6. unpleasant
7. non-stop
8. disrespect
9. unfair
10. disobey

#### Part B:
1. dishonest
2. unzip
3. non-fat
4. disrespect
5. non-stop
6. disagree
7. unpleasant
8. disobey
9. unripe
10. unfair

---

Let me know if you'd like this formatted as a printable answer key!