Grammarly
Grammarly Blog: When to Use Commas and When Not
This page focuses on the uses and misuses of commas. It provides examples of comma uses and explains when the commas are unnecessary.
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Grammarly Blog: Comma Within a Comparison
This page focuses on the misuse of a comma by separating the two items being compared. No comma is needed before the conjunction in a comparison unless it includes a non-restrictive clause. Examples of both are provided.
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Grammarly Blog: Comma Emphasizing Contrasting Ideas
This page focuses on the use of commas around contrasting ideas to emphasize that the subject has been modified; examples are provided. Signal words for contrasting ideas include not, unlike and never.
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Grammarly Blog: Run on Sentences
Rules and examples for using commas when writing a complex sentence.
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Grammarly Blog: Comma Before But
This page focuses on the use of a comma before the coordinating conjunction "but" only if it is in front of an independent clause. Examples of proper and improper uses are provided.
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Grammarly Blog: Comma in Dates
This page focuses on the use of commas when writing dates; a comma is used to separate the day from the month, and the date from the year. Examples are provided.
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Grammarly Blog: Comma Before Too
This page explains the use of commas to emphasize the word "too" in a sentence; the use of one, two, or no commas depend of the use of "too" and its placement in the sentence.
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Grammarly Blog: Comma Splice
This page focuses on the misuse of commas by using them to connect two independent clauses, resulting in a comma splice. It offers examples and suggestions for correcting them. It also provides exceptions to the rule with examples.
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Grammarly Blog: As Well as Comma
This page explains that the use of the prhase "as well as" in sentences requires a judgement call; it usually does not require the use of a comma unless it is part of a non-restrictive clause, but exceptions apply. Examples are provided.
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Grammarly Blog: Comma Before Parenthesis
This page explains the proper use of commas with parenthesis: no comma before a parenthesis, no comma after a parenthesis unless it is needed for another reason such as a long introductory clause in a complex sentence, and no commas if...
Grammarly
Grammarly Blog: Oxford Comma
Rules and examples for using a comma before the conjunction in a list.
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Grammarly Blog: Comma Use Around Interrupters
This page focuses on the need for commas around interrupters in sentences and provides examples. Common interrupters include in fact, to say the least, however, generally speaking, sadly, happily, and unfortunately. Nouns of address can...
Grammarly
Grammarly Blog: Unnecessary Comma in a Complex Sentence
Rules and examples for using commas when writing a complex sentence.
The Tongue Untied
University of Oregon the Tongue Untied: Punctuation: Comma
This site features a list of eleven simple rules for comma usage. Come and sharpen your grammar skills when you visit this educational resource.
Soft Schools
Soft Schools: Punctuation: Comma Quiz
Choose the correctly punctuated sentences in this fourteen-question quiz.
Sophia Learning
Sophia: Commas
Watch a video and click through a nine-slide presentation to learn where commas came from, how they are used properly, and when they should not be used. [7:27]
Sophia Learning
Sophia: Cool, Cool Commas
This tutorial focuses on 4 basic comma rules that cover 85% of all comma use: series, compound sentences, direct address, and introductory clauses. It provides an audio clip explaining these 4 rules and 5 short slide shows: one for each...
University of North Carolina
Commas, Commas and More Commas
How do you become a comma super hero? Use this awesome resource to learn more about commas. Students and teachers can brush up on their comma skills when they explore this educational site.
Capital Community College Foundation
Guide to Grammar and Writing: Rules for Comma Usage
Rules and examples of how to use commas correctly in sentences.
Capital Community College Foundation
Guide to Grammar and Writing: Quiz on Comma Usage
In this comma quiz, students read each of two paragraphs and insert necessary commas. When finished with both paragraphs, they click "Explanations" to see the correct comma placements. Java is required. Links are also provided to "Guide...
Online Writing Lab at Purdue University
Purdue University Owl: Commas: Quick Rules
A tutorial that provides strategies when proofreading for commas.
TED Talks
Ted: Ted Ed: Grammar's Great Divide: The Oxford Comma
If you read "Bob, a DJ and a clown" on a guest list, are three people coming to the party, or only one? That depends on whether you're for or against the Oxford comma- perhaps the most hotly contested punctuation mark of all time. When...
TED Talks
Ted: Ted Ed: Comma Story
It isn't easy holding complex sentences together (just ask a conjunction or a subordinate), but the clever little comma can help lighten the load. But how to tell when help is really needed? Terisa Folaron offers some tricks of the comma...
University of Victoria (Canada)
Elc Study Zone: Using Commas
Do you know how to use commas properly? Use this website to learn more about these pesky punctuation marks.