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Grammarly Blog: Comma
This page focuses on comma use; it explains the importance of the comma and provides an example of how drastically a comma can change the meaning of a sentence. It also provides links to 38 different pages of comma rules and examples.
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Grammarly Blog: Comma Usage
This page focuses on some of uses for commas and provides examples of each. These rules include separating items in a series, separating repeating words, to offset information, noun of address, and even change nouns to verbs.
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Grammarly Blog: Comma Between Two Nouns in a Compound Subject or Object
This page focuses on the misuse of a comma by placing one between the two nouns in a compound subject or object. It provides examples of its misuse and explains why it is not correct.
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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: Comma Between Direct Quote and Attributive Tag
This page explains the comma placement needed between a direct quote and its speaker dependent upon the location of the attributive tag. It includes examples of various tag locations.
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Grammarly Blog: Comma Between Correlative Conjunction Sets
This page provides the rules and exceptions for the use of commas when using corratative conjuction sets such as either or, or neither nor, or not only but also. No commas are needed between them unless the comma is needed for other...
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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 After Question Mark
This page explains how to puctuate a direct quotation that ends in a question mark or an explanation point. If the quote comes before the attributive tag, no comma is needed; if the attributive tag comes before the quote, a comma is...
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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: Comma With Subjects and Verbs
This page focuses on the misuse of a comma when it is used to separate the subject of the sentence from the verb. It provides examples of such sentences and one exception to the rule.
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Grammarly Blog: Comma After Introductory Clauses
Rules and examples for using commas correctly with an introductory clause.
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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...
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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...
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.
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Grammarly Blog: Comma Setting Off Non Restrictive Clauses
This page focuses on understanding what a non-restrictive clause is and that it must be set off by commas. It explains that non-restrictive clauses often use begin with the word "which" and offers examples.
Sophia Learning
Sophia: Comma Sense
Notes, a PowerPoint presentation, and a video introducing commas, their purpose, and common usage mistakes. Comma rules and examples concerning coordinating clauses, items in a list, introductory elements, and nouns of direct address are...
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...
Sophia Learning
Sophia: Commas With Numbers, People, and Places
This tutorial focuses on comma usage with numbers, people, and places. It offers a video detailing rules and examples and a slide show with the same information. Real Player is required for the video.