Free Printable Grammar Practice Worksheet - Free Printable

Let's go through each sentence one by one, identify the grammatical mistake, and then provide the corrected version.

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1. Jack run outside to see his friend.

- Mistake: "run" should be "runs" because the subject "Jack" is singular and the sentence is in the present tense.
- Corrected sentence: *Jack runs outside to see his friend.*

✔ Correction: Change run → runs

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2. My dog usually eat around five.

- Mistake: "eat" should be "eats" because the subject "my dog" is singular.
- Corrected sentence: *My dog usually eats around five.*

✔ Correction: Change eat → eats

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3. John drive to work every day.

- Mistake: "drive" should be "drives" because "John" is a singular subject.
- Corrected sentence: *John drives to work every day.*

✔ Correction: Change drive → drives

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4. Monicas dog loves to go running with her.

- Mistake: "Monicas" is missing an apostrophe to show possession. It should be "Monica's" to indicate that the dog belongs to Monica.
- Corrected sentence: *Monica's dog loves to go running with her.*

✔ Correction: Add apostrophe → Monica's

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5. Stan has a friend whos in the military.

- Mistake: "whos" is missing an apostrophe. It should be "whose" (possessive pronoun), not "who's" (which means "who is").
- However, in this context, it's "whose", not "who's", because we're saying "a friend whose [something] is..." — showing possession.
- Corrected sentence: *Stan has a friend whose in the military.* → Wait! That’s still incorrect. The correct form is:
→ *Stan has a friend who is in the military.* OR more naturally: *Stan has a friend whose job is in the military.*

But the original sentence says: *"Stan has a friend whos in the military."*
This is meant to be: "whose" — but it's missing the apostrophe and is written as "whos".

So:
- "whos" → should be whose (possessive) or who's (contraction of "who is").

But since the intended meaning is "a friend whose [he] is in the military", the correct word is whose, not "who's".

Actually, "whose" is the possessive form of "who". So:

> "Stan has a friend whose in the military." → Still missing the verb!

Ah! Here’s the real issue: "whose" is a determiner and needs a noun after it.

So the correct sentence should be:
> *Stan has a friend whose brother is in the military.*
or
> *Stan has a friend who is in the military.*

But the original sentence is missing a verb after "whose".

So likely, the intended correction is:
> "Stan has a friend who is in the military."

Thus, the mistake is "whos" — which is a typo for "who is".

✔ Correction: Change whos → who is
(Note: If you want to use "whose", you'd need a noun: e.g., "whose brother")

But since no noun follows, "who is" is correct.

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Final Answers:

1. Jack run outside to see his friend.
→ Circle: run
→ Correct: Jack runs outside to see his friend.

2. My dog usually eat around five.
→ Circle: eat
→ Correct: My dog usually eats around five.

3. John drive to work every day.
→ Circle: drive
→ Correct: John drives to work every day.

4. Monicas dog loves to go running with her.
→ Circle: Monicas
→ Correct: Monica's dog loves to go running with her.

5. Stan has a friend whos in the military.
→ Circle: whos
→ Correct: Stan has a friend who is in the military.

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✔ Summary of Corrections:
| Sentence | Mistake | Correction |
|--------|--------|-----------|
| 1 | run | runs |
| 2 | eat | eats |
| 3 | drive | drives |
| 4 | Monicas | Monica's |
| 5 | whos | who is |

Let me know if you’d like a printable version or explanation for students!