Commas in compound sentences are commas that separate two complete thoughts, called independent clauses, when they are joined by a coordinating conjunction. Coordinating conjunctions include for, and, nor, but, or, yet, so. Each part of the sentence must be able to stand alone as a complete sentence for the comma rule to apply.
How to UseRule: Always use a comma before the connecting word when joining two complete sentences.
Step 1: Make sure you have two complete thoughts
Each part needs a subject and verb Each part could be its own sentenceStep 2: Put a comma before the connecting word
Examples:
I went to the store. + I bought milk. = I went to the store, and I bought milk.
It was sunny. + We stayed inside. = It was sunny, but we stayed inside.
Using a comma with short, connected phrases
Incorrect: I ran, and jumped. Correct: I ran and jumped. (These are not complete thoughts)Forgetting the comma in compound sentences
Incorrect: I like ice cream but my sister likes cake. Correct: I like ice cream, but my sister likes cake.Using a comma without a connecting word
Incorrect: I went to school, I forgot my backpack. Correct: I went to school, and I forgot my backpack. Correct: I went to school. I forgot my backpack. (Two separate sentences) Examples Compound Sentence Explanation Sarah likes to read, and Tom prefers video games. Two complete thoughts joined by and (Sarah likes to read + Tom prefers video games) We could go to the park, or we could stay home. Two complete thoughts joined by or (We could go to the park + we could stay home) I studied hard, so I passed the test. Two complete thoughts joined by so (I studied hard + I passed the test) The movie was long, but it was really good. Two complete thoughts joined by but (The movie was long + it was really good) Comments(9)GGymnastUlyssesNovember 6, 2025This glossary def on commas in compound sentences is great! I've used it to help my students grasp the concept. Thanks!MLMr. LeeNovember 5, 2025I've been struggling to explain this to my students. This clear definition made it a breeze! Thanks for the great resource.AArtistDianaNovember 4, 2025This glossary def on commas in compound sentences is great! I've used it to help my students grasp the concept. Thanks!AAnglerHarryNovember 4, 2025This glossary page on commas in compound sentences is great! It's helped my students grasp the concept easily. Thanks for the clear rules!GGardenerUmaNovember 4, 2025I've been trying to teach commas in compound sentences. This definition made it so much clearer for my students! Thanks!svg]:px-3 dk:w-auto h-10 dk:h-14 rounded-lg dk:rounded-[15px] px-5 dk:px-7.5 text-sm dk:text-xl text-[#3467FF] bg-white hover:bg-white">Load MoreExplore More TermsApplying New WordsSynthesizing InformationAffixesFantasyThe IR SoundAdjectives in a SentenceView All Ela TermsRecommended Interactive LessonsConvert four-digit numbers between different forms3Math3.NBT.AFind Equivalent Fractions Using Pizza Models3Math3.NF.A.3.a, 3.NF.A.3.bUse Arrays to Understand the Distributive Property3Math3.OA.B.5Identify and Describe Subtraction Patterns3Math3.OA.D.9Use the Rules to Round Numbers to the Nearest Ten3Math3.NBT.A.1Write four-digit numbers in word form3Math3.NBT.AView All Interactive LessonsRecommended VideosMake Inferences Based on Clues in Pictures1EnglishRL.1.1,RI.1.1Verb Tenses2EnglishL.2.1dSubject-Verb Agreement3EnglishL.3.1fUse Conjunctions to Expend Sentences4EnglishL.4.1fCompare and Contrast Across Genres5EnglishRI.5.9Adjective Order5EnglishView All VideosRecommended WorksheetsSight Word Flash Cards: Focus on Nouns (Grade 2)2EnglishRF.2.3f,RF.2.3,RF.2.4bAlliteration Ladder: Super Hero3EnglishRL.3.4Shades of Meaning: Confidence3EnglishL.3.5aSight Word Writing: service3EnglishL.3.2.e,RF.3.3.c,W.3.5Colons and Semicolons4EnglishL.4.2Evaluate Figurative Language8EnglishRL.8.4View All WorksheetsRecommended Coloring PagesFreighter sailing on calm water with a simple wave patternPre-K – KAll SubjectsSeahorse with a simple seashell backgroundPre-K – KAll SubjectsSingle large snowball with a scarf wrapped around itPre-K – KAll SubjectsUnicorn in metallic armor standing majestically in a grassy meadow with a simple tree in the background1 – 2All SubjectsHailstones hitting a window with a simple room inside3 – 4All SubjectsNumber 1 with a farm scene including a cow, pig, and chickens around it5 – 6All SubjectsView All Coloring PagesRecommended BlogsABCya Sound Burst: A Teacher's Guide to Interactive Phonics LearningNovember 16, 2025Science Games Transform Middle School Learning: A Path to Better Engagement and UnderstandingNovember 16, 2025Fireboy and Watergirl Online Multiplayer: Fun Math Games Kids Can Play TogetherNovember 15, 2025Can You Make Your Dog Sit in Bloxd.io? A Parent's Guide to Gaming and Real-World LearningNovember 15, 2025Runaway Toad: The Perfect Math Game for Your ClassroomNovember 15, 2025Suika Watermelon Game: 5 Math Strategies for K-6 ClassroomsNovember 14, 2025View All Blog PostsQUICK LINKSAbout UsPrivacy PolicyTerms of ServiceTOOLSHomework HelperGuide DesignerPodcast MakerPlan BuilderRESOURCESMath GlossaryEnglish GlossaryEnglish Language ArtsMathematicsScienceBook InsightsFun with WordsBlog© 2025 EDU.COM. All rights reserved.智能索引记录
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