Punctuation

Lisa Chen
7 min read
Listen to this study note
Study Guide Overview
This study guide covers SAT punctuation rules, including commas, semicolons, colons, dashes, apostrophes, quotation marks, parentheses, and hyphens. It addresses common errors like comma splices and run-on sentences, and misuse of punctuation marks. It provides practice questions and tips for the exam, emphasizing core rules and careful reading.
#Punctuation Power-Up: Your Last-Minute SAT Guide
Hey there! Punctuation might seem like a small detail, but it's a HUGE deal on the SAT. Think of it as the traffic signals of writing—guiding your reader smoothly through your ideas. Let's get you prepped to ace those questions! 🚦
#Punctuation Rules for Sentences
#Commas and Semicolons
- Commas:
- Use commas to separate independent clauses when they're linked by a FANBOYS conjunction (for, and, nor, but, or, yet, so).
- Use commas to set off nonessential info (nonrestrictive elements), list items, and introductory elements.
- Example: She loves to paint, and she spends hours in her studio.
- Semicolons:
- Use semicolons to join closely related independent clauses that aren't connected by a FANBOYS conjunction.
- Use semicolons to separate items in a list when those items already contain commas.
- Example: She loves cooking, especially baking; reading mystery novels; and hiking in the mountains. 🏔️
#Colons and Dashes
- Colons:
- Use colons to introduce lists, explanations, or examples.
- Use colons to separate independent clauses when the second explains or illustrates the first.
- Example: There's only one thing I want for my birthday: a new laptop. 💻
- Dashes:
- Use dashes to set off parenthetical elements that contain commas, emphasize points, or indicate a sudden shift in thought.
- Use dashes to set off appositives.
- Em dashes (—) replace commas, parentheses, or colons, while en dashes (–) show ranges or link compound adjectives.
- Example: The conference attendees came from three countries—the United States, Canada, and Mexico—to discuss climate change. 🌍
FANBOYS mnemonic for coordinating conjunctions: For, And, Nor, But, Or, Yet, So. Remember these to correctly use commas with independent clauses.
#Punctuation Marks in Writing
#Apostrophes and Quotation Marks
- Apostrophes:
- Use apostrophes to show possession for singular and plural nouns. Example: the cat's toy, the students' projects.
- Use apostrophes to mark omitted letters in contractions. Example: can't, it's.
- Use apostrophes to form certain plurals (lowercase letters, abbreviations with periods, and symbols). Example: p's, M.D.'s, &'s.
- Quotation Marks:
- Use quotation marks to enclose direct quotations, titles of short works (articles, poems, short stories, episodes), and words used in a special way.
- Use single quotation marks for quotations inside quotations.
- Example: She asked, "Did you read 'The Raven' by Edgar Allan Poe?" 📚
#Parentheses and Hyphens
- Parentheses:
- Use parentheses to enclose extra info that's not essential to the sentence's meaning.
- Example: The well-known author (born in 1965) wrote a best-selling novel about the Civil War era (1861–1865).
- Hyphens:
- Use hyphens to join compound words and separate prefixes from proper nouns or adjectives.
- Use hyphens to divide words at the end of a line.
- Use hyphens to show number ranges or clarify meaning in compound modifiers.
- Example: a well-known author, a pre-Civil War event, a ten-year study.
Remember POSSESSIONS, CONTRACTIONS, PLURALS for apostrophes. This will help you remember the three main uses for apostrophes.
#Common Punctuation Errors
#Sentence Structure Errors
- Comma Splices:
- What it is: Joining two independent clauses with just a comma (no FANBOYS).
- How to fix it: Use a period, semicolon, or comma with a FANBOYS conjunction.
- Example: Incorrect: The movie was excellent, the book was even better. Correct: The movie was excellent; however, the book was even better.
- Run-on Sentences:
- What it is: Joining independent clauses without proper punctuation or conjunctions.
- How to fix it: Use a period, semicolon, comma with a FANBOYS, or subordinate one clause.
- Example: Incorrect: The sun was shining the birds were singing. Correct: The sun was shining, and the birds were singing.
#Misuse of Punctuation Marks
- Apostrophes:
- Don't use apostrophes to form plural nouns. Example: Incorrect: The cat's are sleeping. Correct: The cats are sleeping.
- Do include apostrophes in possessive forms. Example: Incorrect: The cats toy. Correct: The cat's toy.
- Modifiers:
- Keep modifiers close to the words they describe to avoid confusion.
- Quotation Marks:
- Place punctuation inside quotation marks, except for semicolons and colons.
- Consistency:
- Avoid unnecessary or inconsistent punctuation. Example: Incorrect: The company's profits increased by 15% in the third quarter—(a significant improvement over previous years). Correct: The company's profits increased by 15% in the third quarter (a significant improvement over previous years).
Avoid using apostrophes to form plural nouns. This is a very common mistake. Remember, use apostrophes for possession and contractions, not for simple plurals.
#Final Exam Focus
Okay, you're almost there! Here's what to focus on:
- High-Priority Topics:
- Commas with FANBOYS: Make sure you know how to correctly separate independent clauses.
- Semicolons: Know when to use them to link related ideas.
- Dashes: Understand how to use them for emphasis and parenthetical information.
- Apostrophes: Master possessives and contractions.
- Common Question Types:
- Identifying and correcting comma splices and run-on sentences.
- Choosing the correct punctuation mark for specific contexts.
- Placing modifiers correctly to avoid ambiguity.
- Last-Minute Tips:
- Read carefully: Pay close attention to the context of each sentence.
- Eliminate wrong answers: Use process of elimination to narrow down your choices.
- Trust your ear: If something sounds off, it probably is.
- Don't overthink it: Stick to the basic rules you've reviewed.
When you're short on time, focus on the core punctuation rules: comma splices, run-ons, and apostrophes. These are often the easiest to spot and fix quickly.
#Practice Questions
Practice Question
Multiple Choice Questions:
-
The old house stood on a hill overlooking the town its windows were dark and empty. (A) town, its (B) town; its (C) town. Its (D) town its
-
The team's coach a former Olympic athlete gave a motivational speech before the game. (A) coach, a former Olympic athlete, gave (B) coach; a former Olympic athlete gave (C) coach—a former Olympic athlete—gave (D) coach a former Olympic athlete gave
-
She bought apples, bananas, and oranges; she also bought some grapes. (A) oranges, she (B) oranges; she (C) oranges. She (D) oranges she
Free Response Question:
Rewrite the following paragraph, correcting all errors in punctuation and sentence structure. Explain the changes you made.
"The book I read last night it was a mystery about a detective solving a case, it was very exciting!" The author's writing style it was very descriptive, I could picture everything in my mind. The main character he was very clever he solved the mystery quickly. The ending was surprising and unexpected, it left me wanting more. I cant wait to read the next book in the series.
Scoring Breakdown:
- Corrected Paragraph (4 points):
- "The book I read last night was a mystery about a detective solving a case; it was very exciting!" (1 point for correcting the run-on sentence and adding a semicolon)
- "The author's writing style was very descriptive; I could picture everything in my mind." (1 point for correcting the run-on sentence and adding a semicolon)
- "The main character was very clever; he solved the mystery quickly." (1 point for correcting the run-on sentence and adding a semicolon)
- "The ending was surprising and unexpected, and it left me wanting more. I can't wait to read the next book in the series." (1 point for correcting the run-on sentence, adding a coordinating conjunction, and correcting the contraction)
- Explanation of Changes (2 points):
- 1 point for explaining the correction of run-on sentences (using semicolons or FANBOYS conjunctions).
- 1 point for explaining the correction of the contraction.
You've got this! Remember, punctuation is your friend—it's there to help you communicate clearly and effectively. Now go ace that SAT! 🚀

How are we doing?
Give us your feedback and let us know how we can improve