Punctuation Marks worksheet for identifying correct punctuation usage in sentences.

Let's go through each sentence one by one and determine whether the punctuation is used correctly. We'll write yes if it's correct, and no if it's incorrect.

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1- I had a crazy day at school?
✘ Incorrect. This is a declarative sentence (a statement), not a question. It should end with a period, not a question mark.
✔ Answer: no

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2- When are we going to the museum!
✘ Incorrect. This is a question, so it should end with a question mark, not an exclamation point.
✔ Answer: no

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3- Please take out the trash when you get home.
✔ Correct. This is a polite request and ends with a period. Proper punctuation.
✔ Answer: yes

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4- After school, Sarah, Jennifer, and Susan need to walk home.
✔ Correct. Commas are used properly to separate items in a list and after introductory phrase.
✔ Answer: yes

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5- After, going to work he will go to the market.
✘ Incorrect. The comma after "After" is wrong because "After" is not a complete clause. Also, "going to work" should be part of a prepositional phrase. It should be:
👉 "After going to work, he will go to the market."
So, missing comma after "work" and improper use of comma after "After".
✔ Answer: no

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6- Yes, I got a good grade on my test!
✔ Correct. This is an exclamation expressing excitement. The comma after "Yes" is correct, and the exclamation point is appropriate.
✔ Answer: yes

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7- I was born in July 30, 1989.
✘ Incorrect. In American English, dates are written as: July 30, 1989, but the comma should come *after* the day, not before. However, this sentence has the date format right, but the comma is misplaced — it should be "July 30, 1989", which is actually correct. Wait — let's double-check:

Actually:
✔️ "I was born on July 30, 1989." → correct
But here: "I was born in July 30, 1989." → "in" is incorrect for specific dates.
We say: "on July 30, 1989", not "in".

So two issues:
- Wrong preposition ("in" instead of "on")
- But the comma placement is correct

However, the main issue is the preposition, not punctuation. But since the instruction is about punctuation marks, and the punctuation (comma) is correctly placed, the punctuation itself is correct.

But wait — does the preposition affect punctuation? Not directly. So if only punctuation is being evaluated, the comma is correctly used.

But the sentence says: "in July 30, 1989" — this is grammatically incorrect due to the preposition, but the punctuation (comma) is correct.

So based strictly on punctuation: ✔ yes?

Wait — let’s clarify:
The comma after "30" is correct.
But “in July 30” is ungrammatical — we say “on July 30”.
But that’s grammar, not punctuation.

So if the task is only about punctuation, then yes, the punctuation is correct.

But in many educational contexts, such errors are considered overall correctness.

However, the instructions say: *"Identifying punctuation marks"* — so focus on punctuation.

So comma after the day is correct → ✔ Answer: yes

But some might argue that "in" vs "on" affects how the date is formatted, but technically, the punctuation is fine.

✔ Answer: yes

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8- My friend lives in Paraíso, Cartago.
✔ Correct. The comma separates city and country (or province). This is standard usage.
✔ Answer: yes

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9- Michael says, This is my best day of the week!
✘ Incorrect. When quoting someone, the quoted sentence should be enclosed in quotation marks. Also, there should be a comma inside the quotes if it's direct speech.

Correct form:
👉 "Michael says, 'This is my best day of the week!'"
Or:
👉 Michael says, "This is my best day of the week!"

Here, the quote is missing quotation marks around the actual words.

So punctuation is incorrect — missing quotation marks.

✔ Answer: no

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10- Galileo Galilei said, I invented the telescope.
✘ Incorrect. Again, direct speech needs quotation marks.

Should be:
👉 Galileo Galilei said, "I invented the telescope."

Missing quotation marks.

✔ Answer: no

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Final Answers:

1. no
2. no
3. yes
4. yes
5. no
6. yes
7. yes *(punctuation is correct, even though "in" should be "on")*
8. yes
9. no
10. no

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Summary Table:

| # | Sentence | Answer |
|---|--------|--------|
| 1 | I had a crazy day at school? | no |
| 2 | When are we going to the museum! | no |
| 3 | Please take out the trash when you get home. | yes |
| 4 | After school, Sarah, Jennifer, and Susan need to walk home. | yes |
| 5 | After, going to work he will go to the market. | no |
| 6 | Yes, I got a good grade on my test! | yes |
| 7 | I was born in July 30, 1989. | yes |
| 8 | My friend lives in Paraíso, Cartago. | yes |
| 9 | Michael says, This is my best day of the week! | no |
| 10 | Galileo Galilei said, I invented the telescope. | no |

✔ Final Answer:
1. no
2. no
3. yes
4. yes
5. no
6. yes
7. yes
8. yes
9. no
10. no