This resource, The Top Twenty Most Common Errors, was developed by the Writing Center at Southeastern and submitted by Dr. Cawa Tran from the University of San Diego’s Biology Department.

This document provides examples of the following errors, explaining the effect that they have on readers, and showing how to correct them.

1. Wrong word
2. Missing comma after an introductory element
3. Incomplete or missing documentation
4. Vague pronoun reference
5. Spelling (including homonyms)
6. Mechanical error with a quotation
7. Unnecessary comma
8. Unnecessary or missing capitalization
9. Missing word
10. Faulty sentence structure
11. Missing comma with a nonrestrictive element
12. Unnecessary shift in verb tense
13. Missing comma in a compound sentence
14. Unnecessary or missing apostrophe (including its/it’s)
15. Fused (run-on) sentence
16. Comma splice
17. Lack of pronoun-antecedent agreement
18. Poorly integrated quotation
19. Unnecessary or missing hyphen
20. Sentence fragment