Comma Exercises worksheet for grammar practice.

Thank you for uploading the image. I can see it’s a worksheet titled “Comma Exercises” with two sections:

1. Using commas to separate a long introductory phrase from the main clause.
2. Using commas to separate an introductory clause from the main clause.

I’ll solve each exercise and explain the reasoning clearly.

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## ✔ SECTION 1: Using commas to separate a long introductory phrase from the main clause.

> Rule: If an introductory phrase is longer than about four words, or if it might cause confusion without a pause, use a comma after it to separate it from the main clause.

Let’s go through each sentence:

1. Having been out of the country for several weeks, we returned when we could.

✔ Correct as is.
*Explanation*: “Having been out of the country for several weeks” is a long introductory participial phrase. The comma correctly separates it from the main clause “we returned when we could.”

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2. Reading into the cool late afternoon sun, I found relief from the heat.

✔ Correct as is.
*Explanation*: “Reading into the cool late afternoon sun” is a slightly unusual but grammatically acceptable introductory phrase (though “reading” might be meant to be “resting” — but we follow the text). It’s long enough to warrant a comma before the main clause.

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3. In the heat of a summer afternoon our air conditioner stopped.

✘ Needs correction.
→ Corrected: *In the heat of a summer afternoon, our air conditioner stopped.*
*Explanation*: “In the heat of a summer afternoon” is a prepositional phrase that sets the scene. Since it’s more than a few words and describes when the event happened, it should be followed by a comma.

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4. After our game with Central High School our bus broke down.

✘ Needs correction.
→ Corrected: *After our game with Central High School, our bus broke down.*
*Explanation*: “After our game with Central High School” is a prepositional phrase indicating time. It’s long enough to require a comma before the main clause.

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5. Seeing the swimming pool was empty, I dived in.

✔ Correct as is.
*Explanation*: “Seeing the swimming pool was empty” is a participial phrase acting as an introductory element. The comma correctly separates it from the main clause.

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6. On the day of the bridge at the north end of town, we were waiting for a picnic.

✘ Needs correction.
→ Corrected: *On the day of the bridge at the north end of town, we were waiting for a picnic.*
*Explanation*: The entire phrase “On the day of the bridge at the north end of town” is a long introductory prepositional phrase. It needs a comma to separate it from the main clause. *(Note: The phrase itself is a bit awkward — perhaps it means “on the day of the bridge opening” or “on the day of the event at the bridge”? But we punctuate what’s written.)*

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7. At the last meeting of the cheerleaders, Jane was elected captain.

✔ Correct as is.
*Explanation*: “At the last meeting of the cheerleaders” is a prepositional phrase introducing the time/event. It’s long enough to justify a comma.

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8. Noticing the doors we thought it would rain.

✘ Needs correction.
→ Corrected: *Noticing the doors, we thought it would rain.*
*Explanation*: “Noticing the doors” is a participial phrase modifying “we.” It’s introductory and should be followed by a comma. *(Note: The meaning is odd — “noticing the doors” doesn’t clearly connect to thinking it would rain — but punctuation-wise, the comma is needed.)*

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9. In the middle of our math class Tim became ill.

✘ Needs correction.
→ Corrected: *In the middle of our math class, Tim became ill.*
*Explanation*: “In the middle of our math class” is a prepositional phrase setting the time/location. It’s long enough to require a comma.

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10. Doing nothing else after lunch, we decided to clean the room.

✔ Correct as is.
*Explanation*: “Doing nothing else after lunch” is a participial phrase acting as an introductory element. The comma properly separates it from the main clause.

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## ✔ SECTION 2: Using commas to separate an introductory clause from the main clause.

> Rule: If a sentence begins with a subordinate (dependent) clause — especially one starting with subordinating conjunctions like *when, because, since, after, although, if*, etc. — use a comma to separate it from the main clause.

Let’s go through each:

1. As I entered the room, I realized that I was late again.

✔ Correct as is.
*Explanation*: “As I entered the room” is a dependent clause introduced by “as.” A comma is required before the main clause “I realized that I was late again.”

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2. While I waited at the restaurant, I learned about food.

✔ Correct as is.
*Explanation*: “While I waited at the restaurant” is a dependent clause. The comma correctly separates it from the main clause.

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3. Of course, the restaurant was quite full.

✔ Correct as is.
*Explanation*: “Of course” is an introductory adverb, not a clause. It’s common to set it off with a comma. This is correct punctuation.

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4. Before we have gone to your address and telephone number, ...

✘ Incomplete / Needs correction.
This sentence seems cut off or miswritten. Possibly meant to be:
→ *Before we went to your address and telephone number, ...*
But even then, the logic is unclear. Perhaps:
→ *Before we went to your house, we checked your address and telephone number.*
But based on the original:
If we assume it’s meant to be a complete sentence like:
→ *Before we have gone to your address and telephone number, we called ahead.*
Then:
✔ Corrected: *Before we had gone to your address and telephone number, we called ahead.* (assuming past perfect tense)
*Explanation*: “Before we had gone...” is a dependent clause → needs comma before main clause.

⚠️ Since the original is incomplete, we can only say: Add a comma after the introductory clause, whatever the full sentence may be.

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5. Because the game was one-sided, we left early.

✔ Correct as is.
*Explanation*: “Because the game was one-sided” is a dependent clause starting with “because.” It must be followed by a comma before the main clause.

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## 📝 FINAL ANSWER SUMMARY:

Here are all the corrected sentences with explanations:

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SECTION 1 — Introductory Phrases:

1. ✔️ Having been out of the country for several weeks, we returned when we could.
2. ✔️ Reading into the cool late afternoon sun, I found relief from the heat.
3. ✘ → In the heat of a summer afternoon, our air conditioner stopped.
4. ✘ → After our game with Central High School, our bus broke down.
5. ✔️ Seeing the swimming pool was empty, I dived in.
6. ✘ → On the day of the bridge at the north end of town, we were waiting for a picnic.
7. ✔️ At the last meeting of the cheerleaders, Jane was elected captain.
8. ✘ → Noticing the doors, we thought it would rain.
9. ✘ → In the middle of our math class, Tim became ill.
10. ✔️ Doing nothing else after lunch, we decided to clean the room.

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SECTION 2 — Introductory Clauses:

1. ✔️ As I entered the room, I realized that I was late again.
2. ✔️ While I waited at the restaurant, I learned about food.
3. ✔️ Of course, the restaurant was quite full.
4. ⚠️ Incomplete — Assuming intent: Before we had gone to your address and telephone number, we called ahead. (comma needed after clause)
5. ✔️ Because the game was one-sided, we left early.

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## 💡 KEY TAKEAWAY:

- Use a comma after long introductory phrases (especially >4 words) to avoid misreading.
- Always use a comma after introductory dependent clauses (clauses starting with subordinating conjunctions like *because, when, if, although, since, while, after, as*, etc.).

Let me know if you’d like to practice more examples or need help with grammar rules!