Boundaries

Choose the punctuation that correctly ends or joins clauses, separates items or sets off supplements, including cases where no punctuation is correct. It is part of Standard English Conventions in the Reading and Writing section. The book teaches it in Chapter 11, Boundaries, with 20 practice questions, and tests it 14 more times across the two full-length practice tests.

About Chapter 11

Boundaries questions test the punctuation at the edges of sentences, clauses and phrases. All four answer choices contain the same words; only the marks change. A short list of rules decides every one of these questions, so Boundaries is one of the most learnable skills on the test. Boundaries belongs to the Standard English Conventions domain, together with Form, Structure, and Sense (Chapter 12). The two skills make up about 26 percent of the operational Reading and Writing questions, roughly 11 to 15 questions per section.

What the question looks like

Each question gives a short passage with a blank and this stem: "Which choice completes the text so that it conforms to the conventions of Standard English?" A typical set of choices looks like this:

  • A) layer, it
  • B) layer. It
  • C) layer it
  • D) layer? It

The only questions are which mark belongs at the blank, whether any mark belongs there, and sometimes where the mark goes. In each module, the conventions questions come after the Information and Ideas questions and before Expression of Ideas. Boundaries and Form, Structure, and Sense questions are mixed together and arranged from easiest to hardest.

How to recognize it

Chapter 12 uses the same stem, so read the four choices before you read the passage closely.

  • If the words are identical and only the punctuation changes (perhaps with one capital letter after a period), it is a Boundaries question.
  • If the choices change words, verb forms, pronouns or word order, it is a Form, Structure, and Sense question (Chapter 12).
  • If the choices are different linking words, such as "however," "therefore" and "for example," all punctuated the same way, it is a Transitions question (Chapter 13).

Common traps

  • Comma splice: Both sides of a lone comma could stand as sentences. Apply the period test.
  • Comma before a conjunctive adverb: A comma, then "however," "therefore" or "for example," then a full clause. Use a semicolon or period before the adverb.
  • Comma on the wrong side of FANBOYS: Choices such as "and," or "but," at the blank. The comma goes before the conjunction.
  • Mismatched pair: A supplement opened with a dash, comma or parenthesis. Scan back, find the opener and match it.
  • Colon after an incomplete clause: "include:", "such as:", "consists of:". The words before a colon must form a full sentence.
  • Semicolon before a phrase: One side of the semicolon cannot stand alone.
  • The pause comma: A comma where you would pause in speech, often after a long subject. Long subjects still take no comma before the verb.
  • Commas around essential information: Removing the words would change which person or thing is meant.
  • Question mark after a reported question: "asked whether," "wondered if," "wanted to know how." Reported questions end with a period.

Video lessons

Two short lessons from independent YouTube creators, chosen for this skill. The notes are ours; the videos belong to their creators, who are not affiliated with this site.

  • Every punctuation rule in fifteen minutes (The SAT Gamified, 14:29). Watch for: Semicolons, colons, dashes and commas between and within sentences.
  • Semicolons, worked through (Penguin SAT Prep , 8:37). Watch for: A semicolon joins two complete sentences; test each side.

Practice this skill

The full method, worked examples and 20 practice questions with every answer choice explained are in Chapter 11 of the book and in the study workspace, where an AI coach can talk you through each one.

Independence

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