20 errors
1. Missing comma after an introductory element
2. Vague pronoun reference
3. Missing comma in a compound sentence
4. Wrong word
5. Missing comma(s) with a nonrestrictive element
6. Wrong or missing verb ending
7. Wrong or missing preposition
8. Comma splice
9. Missing or misplaced possessive apostrophe
10. Unnecessary shift in tense
11. Unnecessary shift in pronoun
12. Sentence fragment
13. Wrong tense or verb form
14. Lack of subject-verb agreement
15. Missing comma in a series
16. Lack of agreement between pronoun and antecedent
17. Unnecessary comma(s) with a restrictive element
18. Fused sentence
19. Misplaced or dangling modifier
20. Its/It's confusion



EasyWriter Resources / 20 Most Common Errors /
3. Missing comma in a compound sentence




A compound sentence consists of two or more parts that could each stand alone as a sentence. When the parts are joined by a coordinating conjunction - and, but, so, yet, or, nor, or for - use a comma before the conjunction to indicate a pause between the two thoughts. In very short sentences, the comma is optional if the sentence can be easily understood without it. But you'll never be wrong to use a comma.

For practice recognizing and editing this error, go to Exercise Central.


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