dolphin
Get Started

SAT Reading and Writing skill page

SAT Semicolons and Colons Practice

Know when a punctuation mark connects complete thoughts and when it introduces an explanation.

Practice semicolons and colons in Dolphin SATPractice questions
10-16 min practice time3 questions on pageStandard English Conventions
Practice time10-16 min
Practice questions3 questions
Best forStandard English Conventions

What this tests

What to know for this SAT skill

Dolphin practice questions

Practice your skill

Question 1 of 3Easy
Which sentence uses a semicolon correctly?
  1. The plan was simple; the team would test one variable at a time.
  2. The plan was; simple the team would test one variable.
  3. Because the plan was simple; the team tested one variable.
  4. The plan; was simple and useful.
Show answer and solution
Correct answerA. The plan was simple; the team would test one variable at a time.

Solution walkthrough

  1. A semicolon can join two complete, closely related clauses.
Question 2 of 3Medium
Which sentence uses a colon correctly?
  1. The study focused on: sleep, memory, and attention.
  2. The study focused on three areas: sleep, memory, and attention.
  3. The study focused: on sleep, memory, and attention.
  4. The study: focused on three areas sleep, memory, and attention.
Show answer and solution
Correct answerB. The study focused on three areas: sleep, memory, and attention.

Solution walkthrough

  1. The words before the colon form a complete idea that introduces the list.
Question 3 of 3Hard
Which choice correctly completes the sentence? The evidence pointed to one conclusion ___ the treatment was effective.
  1. ,
  2. :
  3. and
  4. which
Show answer and solution
Correct answerB. :

Solution walkthrough

  1. The second part explains the conclusion, so a colon is appropriate after a complete clause.
  2. A comma alone creates a comma splice, "and" needs a comma before it and does not signal an explanation, and "which" makes the sentence ungrammatical.

Avoid these traps

Common mistakes on this skill

Using a semicolon without two independent clauses

A semicolon can join closely related independent clauses, but neither side may be a fragment.

Putting a colon after an incomplete lead-in

The words before a colon must form a complete sentence that introduces what follows.

Study plan

How to practice this skill in Dolphin

Dolphin Web gives you a personalized SAT study plan with lessons, unlimited Pip AI help, practice questions, full-length tests, and mistake review. The iPhone and Android apps are free. See plans.

  1. Classify the text on both sides of the punctuation as a clause, phrase, list, or explanation.
  2. Use a semicolon only when both sides can stand as sentences.
  3. Use a colon only after a complete clause that sets up an example, list, or explanation.
Practice semicolons and colons in Dolphin SAT

Related practice

Build the surrounding skills

SAT Sentence Boundaries PracticeSAT Transitions PracticeSAT Reading and Writing skill hub

Skill cluster

Keep practicing SAT Reading and Writing

SAT Reading and Writing skill hubSAT Transitions PracticeSAT Command of Evidence PracticeSAT Words in Context PracticeSAT Subject-Verb Agreement PracticeSAT Sentence Boundaries PracticeSAT Rhetorical Synthesis PracticeSAT Central Ideas PracticeSAT Modifiers PracticeSAT Apostrophes and Possessives PracticeSAT Text Structure PracticeSAT Inference Questions PracticeSAT Pronoun Antecedent PracticeSAT Verb Tense PracticeSAT Commas PracticeSAT Parallel Structure PracticeSAT Logical Transitions PracticeSAT Boundaries Between Clauses PracticeSAT Main Idea PracticeSAT Evidence Support PracticeSAT Vocabulary in Context PracticeSAT Cross-Text Connections PracticeSAT Quantitative Evidence PracticeSAT Math Practice PagesDolphin SAT study guidesSAT score guides by college

FAQ

Questions about SAT Semicolons and Colons Practice

Can a semicolon replace a period?

Yes, when it joins two closely related independent clauses.

What must come before a colon?

A complete independent clause, not a verb or preposition that still needs its object.