Here are the sentences with the correct hyphens added, along with an explanation of why they are needed.
1. The teacher managed to de-escalate the fight before anyone got hurt.
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Hyphen: de-escalate
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Why: We use a hyphen when joining the prefix "de-" to a root word that starts with a vowel (like "escalate") to make it easier to read and pronounce.
2. Priya is playing with her twelve-year-old cousins.
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Hyphen: twelve-year-old
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Why: When an age is used as an adjective *before* the noun it describes ("cousins"), we connect all the words with hyphens to show they work together as one description.
3. The slow-moving cars crept along in the traffic jam.
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Hyphen: slow-moving
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Why: This is a compound adjective. "Slow" and "moving" work together to describe the "cars." Without the hyphen, it might look like "slow" is describing "moving cars" separately.
4. Ms Moor is remarking all the spelling tests after she caught Sam cheating.
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Hyphen: re-marking
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Why: This needs a hyphen to avoid confusion with the word "remarking" (which means making a comment). "Re-marking" means marking the tests *again*. The hyphen clarifies the meaning.
5. For my birthday, I received twenty-two presents.
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Hyphen: twenty-two
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Why: We always use a hyphen when writing out numbers from twenty-one to ninety-nine.
6. He works as a mechanic fixing cars part-time.
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Hyphen: part-time
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Why: "Part-time" is a standard compound word that is usually hyphenated, whether it comes before or after the verb.
**7. My mum is going to recover our sofa because
Parent Tip: Review the logic above to help your child master the concept of hyphen worksheet.
