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Online Writing Lab at Purdue University
Purdue University Owl: Exercise: Comma vs. Semicolon: Compound Sentences
A handout with forty sentences for practicing comma and semicolon usage in compound sentences; answer key provided.
Capital Community College Foundation
Guide to Grammar and Writing: Using Commas With Coordinating Conjunctions
An exercise with ten compound sentences. Students are asked to type the commas where they belongs in compound sentences with a coordinating conjunctions. Then students can check their answers to see how they did.