Which Of The Following Sentences Is Punctuated Correctly

Which of the Following Sentences Is Punctuated Correctly? A Friendly Guide to Getting Your Commas, Semicolons, and More Right

Introduction

Have you ever stared at a sentence and wondered whether that comma belongs there or if a semicolon would do a better job? You’re not alone. Punctuation can feel like a secret code that only the most meticulous writers seem to crack. The truth is, once you understand the basic rules, punctuation stops being a mystery and starts becoming a tool that makes your writing clearer, more persuasive, and a lot easier to read.

In this guide we’ll walk through the most common punctuation marks, look at a handful of example sentences, and figure out together which of the following sentences is punctuated correctly. By the end, you’ll have a handy checklist you can keep beside your keyboard whenever you sit down to write an email, a report, or even a casual text.

Why Punctuation Matters

Before we dive into the examples, it’s worth pausing to ask why we bother with all those little marks at all. A period is a stop sign, a comma is a yield sign, a semicolon is a gentle merge lane, and a quotation mark is a signpost that tells the reader, “Hey, someone is speaking here.Still, think of punctuation as the traffic signals of written language. ” When those signals are missing or misplaced, readers can get confused, lose the thread of your argument, or worse — misunderstand your meaning entirely. Nothing fancy.

Good punctuation does more than prevent confusion; it adds rhythm and emphasis. A well‑placed comma can create a pause that lets a joke land, while a semicolon can link two related ideas in a way that feels more sophisticated than a simple period. In short, mastering punctuation gives you control over how your voice comes across on the page.

Common Punctuation Marks – A Quick Refresher

Before we jump into the practice sentences, let’s refresh the basics. Feel free to skim this section if you already feel confident; the goal is to make sure we’re all speaking the same language when we evaluate the examples later.

Commas (,)

• Separate items in a list: apples, bananas, and oranges*
• Set off introductory elements: After the rain stopped, we went for a walk.*
• Separate independent clauses joined by a coordinating conjunction (and, but, or, nor, for, so, yet): I wanted to go for a run, but it started raining.*
• Set off non‑essential clauses: My brother, who lives in Tokyo, is visiting next week.*

Semicolons (;)

• Join two closely related independent clauses without a conjunction: She loves hiking; he prefers cycling.*
• Separate items in a complex list where the items themselves contain commas: We visited Paris, France; Rome, Italy; and Tokyo, Japan.*

Colons (:)

• Introduce a list, explanation, or quotation: She brought three things to the picnic: a blanket, a bottle of wine, and a good book.*
• Introduce a quote or explanation that expands on the first clause: He had one motto: work hard, stay humble.*

Apostrophes (’)

• Show possession: the cat’s toy*, the students’ projects*
• Form contractions: don’t*, can’t*, it’s* (note: its without an apostrophe is the possessive form)

Quotation Marks (“ ”)

• Enclose direct speech: She said, “I’ll be there at five.”*
• Set off titles of short works (articles, poems, short stories): She loved reading “The Lottery” in class.*
• Indicate irony or a term used in a special sense: He gave a “generous” tip of two cents.*

Dashes (– and —)

• En dash (–) for ranges: pages 10–15*
• Em dash (—) for a strong break or emphasis: She finally answered the question — after a long pause.*

Parentheses ()

• Add supplemental information that isn’t essential to the main point: The results (which were unexpected) prompted further study.*

Now that we’ve refreshed the basics, let’s move on to the fun part: evaluating some sentences.

How to Judge Whether a Sentence Is Punctuated Correctly

When you look at a sentence, ask yourself a few quick questions:

1. Are the clauses properly separated? Independent clauses need either a period, a semicolon, or a comma plus a coordinating conjunction.
2. Are items in a list separated correctly? Remember the Oxford comma (the comma before “and” or “or” in a list) is optional in many style guides but can prevent ambiguity.
3. Are non‑essential clauses set off with commas? If you can remove the phrase and the sentence still makes sense, it likely needs commas around it.
4. Are quotation marks placed correctly? In American English, commas and periods go inside the quotation marks; colons and semicolons go outside.
5. Are apostrophes used only for possession or contraction? Never use an apostrophe to make a plural noun.

Keep these questions in mind as we look at the following sets of sentences. For each set, I’ll present three options labeled A, B, and C. Your job is to pick the one that is punctuated correctly. After each set, I’ll explain why the correct choice works and why the others don’t.

For more on this topic, read our article on how many milliliters are in 1.5 liters or check out how many seconds in 365 days.

Practice Set 1 – Commas and Semicolons

A. She wanted to go for a run, but it started raining.*
B. She wanted to go for a run but it started raining.*
C. She wanted to go for a run; but it started raining.*

Correct answer: A

Why?

Why?
Sentence A correctly uses a comma before the coordinating conjunction but to join two independent clauses (She wanted to go for a run* and it started raining*). Sentence B is a run‑on — it lacks any punctuation or conjunction to separate the clauses. Sentence C misuses the semicolon; a semicolon can link independent clauses on its own, but it cannot be followed by a coordinating conjunction like but.

Practice Set 2 – The Oxford Comma

A. For breakfast I had eggs, toast and orange juice.*
B. For breakfast I had eggs, toast, and orange juice.*
C. For breakfast I had eggs; toast, and orange juice.*

Correct answer: B

Why?
Sentence B includes the Oxford comma after toast*, which eliminates any possible ambiguity about whether toast and orange juice* are a single item. Sentence A is acceptable in style guides that omit the Oxford comma, but it can create confusion in more complex lists. Sentence C incorrectly mixes a semicolon with commas in a simple list.

Practice Set 3 – Non‑Essential Clauses

A. My brother who lives in Chicago is visiting this weekend.*
B. My brother, who lives in Chicago, is visiting this weekend.*
C. My brother, who lives in Chicago is visiting this weekend.*

Correct answer: B

Why?
The clause who lives in Chicago* is non‑essential (the speaker has only one brother), so it must be set off by commas on both sides. Sentence A implies the speaker has multiple brothers and is specifying which one. Sentence C omits the closing comma, leaving the clause unclosed.

Practice Set 4 – Quotation Marks and Punctuation

A. She whispered, “Don’t forget the tickets”.*
B. She whispered, “Don’t forget the tickets.”*
C. She whispered “Don’t forget the tickets.”*

Correct answer: B

Why?
In American English, the period goes inside the closing quotation marks. Sentence A places the period outside, which is British convention but incorrect here. Sentence C omits the comma after the reporting verb whispered*, which is needed to introduce the direct quotation.

Practice Set 5 – Apostrophes

A. The dog’s collar is red; the cats’ toys are scattered everywhere.*
B. The dogs collar is red; the cat’s toys are scattered everywhere.*
C. The dog’s collar is red; the cat’s toys are scattered everywhere.*

Correct answer: A

Why?
Sentence A correctly shows singular possession (dog’s*) and plural possession (cats’). Sentence B misses the apostrophe in dogs and misassigns the toys to a single cat. Sentence C uses the singular possessive for cat when the context implies multiple cats.

Practice Set 6 – Dashes and Parentheses

A. The results — which were unexpected — prompted further study.*
B. The results – which were unexpected – prompted further study.*
C. The results (which were unexpected) prompted further study.*

Correct answer: C

Why?
The phrase which were unexpected* is supplemental, non‑essential information — exactly what parentheses are designed for. Em dashes (Sentence A) can also set off such material, but they add emphasis that may not be intended. En dashes (Sentence B) are incorrect for this purpose; they belong in ranges, not clause boundaries.

Putting It All Together

Punctuation isn’t about memorizing arbitrary rules — it’s about guiding the reader’s eye and ear. Consider this: when you edit, read your sentences aloud. A well‑placed comma prevents a misreading; a semicolon shows a relationship between ideas; quotation marks signal a voice other than the writer’s. If you stumble, a punctuation mark is likely missing or misplaced.

Keep a style guide handy (Chicago, AP, APA — whichever your context demands), but also trust your internal rhythm. The best punctuation becomes invisible, letting the meaning shine through without distraction.

Now, the next time you write its versus it’s* or debate a dash versus a comma, you’ll have a framework to decide — not just a guess.