dolphin
Get Started

SAT Reading and Writing skill page

SAT Commas Practice

Use commas to organize sentence parts without splitting ideas that belong together.

Practice commas in Dolphin SAT Try examples
10-16 min practice time 3 examples on page Standard English Conventions
Practice time 10-16 min
On-page examples 3 examples
Best for Standard English Conventions

What this tests

What to know for this SAT skill

Practice examples

Try a few SAT-style questions

Example 1 Easy

Which sentence uses a comma correctly?

  1. After the storm passed, the team resumed practice.
  2. After, the storm passed the team resumed practice.
  3. After the storm, passed the team resumed practice.
  4. After the storm passed the, team resumed practice.
Show answer and explanation

Answer: After the storm passed, the team resumed practice.

A comma after the introductory clause helps separate it from the main clause.

Example 2 Medium

Which sentence correctly punctuates nonessential information?

  1. The device which was invented in 2019 quickly spread.
  2. The device, which was invented in 2019, quickly spread.
  3. The device which, was invented in 2019 quickly spread.
  4. The device which was invented, in 2019 quickly spread.
Show answer and explanation

Answer: The device, which was invented in 2019, quickly spread.

The which phrase adds extra information, so it should be set off with commas.

Example 3 Hard

Which choice avoids a comma splice?

  1. The results were surprising, the team repeated the test.
  2. The results were surprising, and the team repeated the test.
  3. The results were surprising the team, repeated the test.
  4. The results, were surprising the team repeated the test.
Show answer and explanation

Answer: The results were surprising, and the team repeated the test.

Two independent clauses need a conjunction with the comma, or stronger punctuation.

Quick drills

Practice this skill from more angles

Drill 1

Use commas after introductory phrases

Pause before the answer choices, write the rule or setup you need, then check whether the question is asking for the value, the relationship, or the best-supported conclusion.

Drill 2

Set off nonessential information

Pause before the answer choices, write the rule or setup you need, then check whether the question is asking for the value, the relationship, or the best-supported conclusion.

Drill 3

Separate items in a list

Pause before the answer choices, write the rule or setup you need, then check whether the question is asking for the value, the relationship, or the best-supported conclusion.

Drill 4

Avoid comma splices between independent clauses

Pause before the answer choices, write the rule or setup you need, then check whether the question is asking for the value, the relationship, or the best-supported conclusion.

Avoid these traps

Common mistakes on this skill

Solving before naming the task

The SAT often hides the real skill inside familiar wording. Identify the rule, relationship, or question type first.

Choosing an answer that only partly fits

Many wrong answers are close. Check every condition in the question before committing.

Skipping the final check

Reread what the question asks for so you do not answer a nearby but different question.

Study plan

How to practice this skill in Dolphin

  1. Read the question and name the tested skill before looking at the choices.
  2. Write the equation, rule, or passage relationship in plain language.
  3. Eliminate answers that violate the setup or overstate the evidence.
  4. Review misses by writing the exact trap that pulled you toward the wrong answer.
Practice commas in Dolphin SAT

Related practice

Build the surrounding skills

SAT Punctuation PracticeSAT Sentence Boundaries PracticeSAT Apostrophes and Possessives PracticeSAT Reading and Writing skill hub

Skill cluster

Keep practicing SAT Reading and Writing

SAT Reading and Writing skill hub SAT Punctuation PracticeSAT 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 Semicolons and Colons 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 Practice SAT Math Practice Pages Dolphin SAT study guides SAT score guides by college

FAQ

Questions about SAT Commas Practice

What is the best way to practice SAT Commas Practice?

Start with a few focused examples, review the mistake pattern, then mix the skill into full SAT practice so you can recognize it in context.

Why does this skill matter on the SAT?

It shows up in short, high-leverage questions where one missed rule or setup can quickly cost a point.

Can Dolphin SAT help me drill this skill?

Yes. Dolphin SAT can surface targeted practice, track missed questions, and help you review the patterns that keep repeating.