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Comma power point
- 1. Purdue University WritingLab Conquering the Comma A workshop brought to you by the Purdue University Writing Lab
- 2. Purdue University WritingLab What Is a Comma? A comma is a punctuation mark that indicates a pause is needed in a sentence. Commas help to clarify meaning for the reader.
- 3. Purdue University WritingLab Clauses and Phrases A clause is a group of words that contains both a subject and a verb that complement each other. A phrase is a group of words that does not contain a subject or a verb that complement each other.
- 4. Purdue University WritingLab Sentence Structure: Independent Clause A complete sentence has two components, a subject and a verb. The subject and verb must form a complete thought to be considered an independent clause. The couple dances.The couple dances. subject (S) verb (V)
- 5. Purdue University WritingLab Sentence Structure: Compound Sentence A sentence that contains two independent clauses joined by a coordinating conjunction is called a compound sentence. A conjunction joins words, phrases, and clauses together in a sentence. Conjunctions for and nor but or yet so FAN BOYS
- 6. Purdue University WritingLab Sentence Structure: Compound Sentence The comma in a compound sentence is placed before the coordinating conjunction. Andy built a snowman, and Jeff played with his dog. S V conj. Andy built a snowman, and Jeff played with his dog. S V
- 7. Purdue University WritingLab Where would you place the comma in the following sentence? Sentence Structure: Compound Sentence Dan struggled with his homework so his father helped him.Dan struggled with his homework, so his father helped him. S V conj. S V
- 8. Purdue University WritingLab Sentence Structure: Dependent Clause A dependent clause contains a subject and verb, but the clause cannot stand independently. Dependent clauses can often be identified by the use of dependent clause markers. Some dependent clause markers: because since when while until if as though although unless after before once whether
- 9. Purdue University WritingLab Sentence Structure: Dependent Phrases and Clauses Dependent phrases and clauses help to clarify and add detail to an independent clause. Dependent clauses may appear at the beginning, middle, or end of a sentence.
- 10. Purdue University WritingLab Introductory clause= dependent clause located at the beginning of a sentence When a dependent clause is placed at the beginning of a sentence, place a comma between the independent clause and the dependent clause. When Elizabeth called 911, the firemen rushed to her rescue.When Elizabeth called 911, the firemen rushed to her rescue. DCM S V S V
- 11. Purdue University WritingLab Introductory Clause Where would you place the comma in the following examples? After the movie ended we went out for coffee. Since it was raining we decided to go to the movies. Once the movie began I fell asleep. Since it was raining, we decided to go to the movies. DCM S V S V Once the movie began, I fell asleep. DCM S V S V After the movie ended, we went out for coffee. DCM S V S V
- 12. Purdue University WritingLab Dependent Clauses When a dependent clause is located after an independent clause, DO NOT place a comma between the two. I went on the roller coaster because my brother dared me. S V DCM S V I became very sick when the S V DCM roller coaster zoomed upside down. S V
- 13. Purdue University WritingLab Sentence Structure: Essential Phrases and Clauses An essential clause or phrase is used to modify a noun. It also adds information that is critical to the meaning of the sentence. Essential clauses are NOT set off by commas.
- 14. Purdue University WritingLab The people who work in my office are so uptight! Sentence Structure: Essential Phrases and Clauses S essential phrase V Without the essential phrase, this sentence does not make complete sense : The people are so uptight!
- 15. Purdue University WritingLab The martini that I had at Joe’s was much better than this one! Sentence Structure: Essential Phrases and Clauses S essential V The word “that” is almost always an indicator of an essential phrase or clause.
- 16. Purdue University WritingLab Sentence Structure: Nonessential Phrases and Clauses A nonessential phrase or clause adds extra information to a sentence. This information can be eliminated from the sentence without jeopardizing the meaning of the sentence. Always place commas around nonessential phrases and clauses.
- 17. Purdue University WritingLab My brother, who lives across town, plans to throw a party! S non-essential V Even without the phrase the sentence still makes sense : My brother plans to throw a party! Sentence Structure: Nonessential Phrases and Clauses
- 18. Purdue University WritingLab Steve said that he would propose to me on Valentine’s Day, which is my favorite holiday! S V non-essential Use commas to set off additional information Sentence Structure: Nonessential Phrases and Clauses
- 19. Purdue University WritingLab Would you place commas in the following sentences? If so, where? I am planning a trip to Paris which is one of the greatest cities in the world. No comma is needed. The sentence is correct. The place that I would most like to see is the Eiffel Tower. Pierre who is one of my business contacts will meet me at the airport. I am planning a trip to Paris, which is one of the greatest cities in the world. Pierre, who is one of my business contacts, will meet me at the airport.
- 20. Purdue University WritingLab Sentence Structure: Commas in a Series Place commas in a sentence to divide items in a list. The commas will help the reader to avoid confusion. The comma before the conjunction is generally required, but it can be omitted if there is no possibility of confusion.
- 21. Purdue University WritingLab Sentence Structure: Commas in a Series Consider the difference in the following: Last month, Alex dated Mary Ann Lee and Kim. Last month, Alex dated Mary, Ann, Lee, and Kim. Last month, Alex dated Mary Ann, Lee, and Kim. How many women did Alex date?
- 22. Purdue University WritingLab Commas should be placed in series of words, phrases, or clauses. Place commas in the following sentences: Sentence Structure: Commas in a Series Martina brushed her hair put on her pajamas and went to bed. She fell asleep and dreamed that she was a princess she kissed a frog and she rescued her prince. Martina brushed her hair, put on her pajamas, and went to bed. She fell asleep and dreamed that she was a princess, she kissed a frog, and she rescued her prince.
- 23. Purdue University WritingLab Commas with adjectives Use commas to separate adjectives that provide an equal description of a noun. THE TEST: Can you put “and” between the adjectives? Can they be described in reverse order? If so, use a comma. big blue house three hungry kittens a cranky, ungrateful man
- 24. Purdue University WritingLab A Common Comma Error: The Comma Splice A comma splice is an error in which two independent clauses are joined by a comma. We had a nice time, I hope we can meet again soon. S V S V The Internet has revolutionized the business world, S V online sales have increased dramatically this year. S V
- 25. Purdue University WritingLab To Correct a Comma Splice Insert a conjunction between the two independent clauses. Start a new sentence. Insert a semi-colon between the two independent clauses (only in cases where the independent clauses are closely related in topic). •We had a nice time, and I hope we can meet again soon. •We had a nice time. I hope we can meet again soon. •The Internet has revolutionized the business world; online sales have increased dramatically this year.
- 26. Purdue University WritingLab How would you correct the following sentences? This semester I am taking calculus physics and economics. Calculus is my best subject, I am certain I will get an A. Although I am very busy I still find time to have fun. Last weekend my brother visited me and we went to a football game a party and a rock concert. This semester I am taking calculus, physics, and economics. Calculus is my best subject, and I am certain I will get an A. Although I am very busy, I still find time to have fun. Last weekend my brother visited me, and we went to a football game, a party, and a rock concert.
- 27. Purdue University WritingLab Where can you go for additional help with comma usage? Purdue University Writing Lab Heavilon 226 Grammar Hotline: (765) 494-3723 Check our web site: http://owl.english.purdue.edu Email brief questions: owl@owl.english.purdue.edu Purdue University Writing Lab
Editor's Notes
- #2 Rationale: Welcome to “Conquering the Comma.” This presentation is designed to acquaint your students with the rules of comma usage, including placement in compound sentences, after introductory elements, with dependent phrases and clauses, around nonessential elements, in a series, and with adjectives. This presentation will also cover methods for avoiding a common comma error—the comma splice. The twenty-seven slides presented here are designed to aid the facilitator in an interactive presentation of the elements of comma usage. This presentation is ideal for the beginning of a composition course, the assignment of a writing project, or as a refresher presentation for grammar usage. This presentation may be supplemented with OWL handouts, including “Using Commas” (http://owl.english.purdue.edu/handouts/grammar/g_comma.html), “Commas after Introductions” (http://owl.english.purdue.edu/handouts/grammar/g_commaint.html), and “Commas with Non-essential Elements” (http://owl.english.purdue.edu/handouts/grammar/g_commaess.html). Directions: Each slide is activated by a single mouse click, unless otherwise noted in bold at the bottom of each notes page. Writer and Designer: Jennifer Liethen Kunka Contributors: Muriel Harris, Karen Bishop, Bryan Kopp, Matthew Mooney, David Neyhart, and Andrew Kunka Developed with resources courtesy of the Purdue University Writing Lab Grant funding courtesy of the Multimedia Instructional Development Center at Purdue University © Copyright Purdue University, 2000.
- #3 Key Concepts: The facilitator may choose to invite the audience to respond to the title question and allow participants to discuss the function of the comma. Many writers become frustrated with comma usage because they are unsure of where to place them in their sentences. This presentation is designed to demystify the placement and usage of commas. The facilitator may stress to participants that commas should not be ignored in writing; they are often needed to clarify meaning within a sentence and can help to avoid confusion. Click mouse after title question to reveal each response.
- #4 Key Concepts: This slide articulates the basic differences between a clause and a phrase . The facilitator may stress the importance of understanding these definitions for understanding comma placement.
- #5 Key Concepts: This slide explains the structure of an independent clause , the primary building block for the development of any sentence. An independent clause requires a subject and a verb that can stand as a complete thought. Sentences can be very short, as the one detailed in the slide. The facilitator may ask the audience to identify the subject and verb in the example. Click mouse after text appears to reveal picture and sample sentence. Click mouse after sample sentence to reveal the labels “subject” and “verb.”
- #6 Key Concepts: This slide explains the structure of a compound sentence and the role of a conjunction. An easy method for remembering the seven coordinating conjunctions is the acronym “fan boys.” Click mouse at the end of the first column. Click mouse at the end of the conjunction list to reveal the acronym.
- #7 Example: This slide exemplifies the location of a comma in a compound sentence, before the coordinating conjunction. The facilitator may ask participants to identify the subjects, verbs, and conjunction in the example. Click after example sentence appears to reveal parts of speech.
- #8 Example: This slide provides participants with an opportunity to locate the correct position for the comma within the sample sentence. The facilitator may also invite students to identify the subjects, verbs, and conjunction in the sentence. Click mouse after sample sentence to reveal the comma. Click mouse after the comma to reveal parts of speech .
- #9 Key Concepts: This slide explains the definition of a dependent clause . The dependent clause markers can help writers identify clauses that cannot stand alone within a sentence.
- #10 Key Concepts: This slide further clarifies the role of dependent phrases and clauses within a sentence.
- #11 Key Concepts: An introductory clause is a dependent clause located at the beginning of a sentence. After an introductory clause, a comma is needed to distinguish it from the independent clause. Activity: The facilitator may choose to ask students to identify the independent and dependent clauses, the subjects, the verbs, and the dependent clause marker in the sample sentence. Click mouse to reveal the parts of speech.
- #12 Activity: This interactive slide invites participants to place commas after the introductory clauses in each sentence. Again, the facilitator may ask students to identify the parts of speech in each example. Click mouse to reveal parts of speech, and then click again to reveal each example.
- #13 Activity: When a dependent clause follows an independent clause, commas are not used. Facilitators may choose to ask students to identify the parts of speech in each example.
- #14 Key Concepts: This slide leads off a section about essential and non-essential phrases and clauses . Essential phrases and clauses—elements that add critical information to the meaning of a sentence—do not have commas placed around them.
- #15 Example: This example illustrates the placement of an essential phrase within a sentence. The phrase “who work in my office” is critical to the overall meaning of the sentence; therefore, it should not be set off with commas. If the clause or phrase is eliminated from the sentence and the sentence no longer makes sense, the clause or phrase is essential.
- #16 Key Concept: The word “that” almost always indicates an essential phrase or clause .
- #17 Key Concepts: This slide illustrates the difference between essential and nonessential elements. While commas should not be placed around essential phrases and clauses, they should be placed around nonessential phrases and clauses.
- #18 Example: Nonessential phrases and clauses can be removed from sentences without jeopardizing the overall meaning of a sentence. In this example, “who lives across town” is superfluous information; it is not critical to the main message of the sentence—the woman’s brother will throw a party for her.
- #19 Example: This slide provides another example illustrating the placement of a nonessential phrase within a sentence. At the end of a sentence, the nonessential element should have a comma placed before it and a period after it. The facilitator may wish to stress that “which” often, but not always, indicates a nonessential phrase or clause.
- #20 Activity: These examples allow participants an opportunity to test their comma skills. The first example needs a comma after “Paris” to set off the nonessential phrase. The second example requires no comma. The phrase “that I would most like to see” is essential to the meaning of the sentence. The sentence will not make sense without this essential phrase. The third example requires two commas, both before and after the nonessential phrase “who is one of my business contacts.” The main message of this sentence—that Pierre will meet this person at the airport—is clear without knowing the additional information about his identity. Click to reveal the comma placement for each example.
- #21 Key Concept: Commas should be placed between each element within a list. This placement can help the reader to avoid confusion.
- #22 Activity: These examples illustrate the importance of comma placement within a list. The facilitator may ask students to answer the question “How many women did Alex date?” in accordance with each example—two women in the first, four in the second, and three in the third. Click to reveal each example.
- #23 Activity: The facilitator may stress to participants that a series includes a list of words, but it can also include a list of phrases or clauses. This exercise allows participants to determine when the commas should be placed in each sentence. Click to reveal commas for each sentence.
- #24 Key Concepts: Students often find comma placement between adjectives to be tricky. The key is to determine if the adjectives are equal—meaning that they modify the noun in the same capacity. Adjectives of size and quantity are generally considered to be unequal to adjectives of character or quality. Placing “and” between adjectives or reversing the order of adjectives are good tests to determine if a comma is needed.
- #25 Key Concepts: One of the most prevalent comma errors is the comma splice—the placement of a comma between two independent clauses.
- #26 Key Concepts: This slide enumerates several methods for correcting comma splices. The examples listed here are corrections of the comma splices in the previous slide.
- #27 Activity: This slide invites participants to again test their comma skills. The first example requires commas between each element within the list. The second example contains a comma splice. The sentence may be corrected by the addition of a conjunction after the comma, turning the comma splice into a compound sentence. This example may also be corrected by separating the two clauses into two separate sentences, or by changing the comma to a semi-colon. The third example requires a comma after the introductory clause. The facilitator may wish to note that “although” is a dependent clause marker. The fourth example, a compound sentence, requires a comma before the conjunction. Commas are also needed after each element in the list. Click mouse to reveal comma placement for each example.
- #28 Rationale: As the presentation concludes, the facilitator can remind students that they can come to the Writing Lab for extra help with comma usage. Click mouse after the title question. For additional assistance with comma usage, see: Harris, Muriel. Prentice Hall Reference Guide to Grammar and Usage . 4 th ed. Upper Saddle River, NJ: Prentice Hall, 2000.