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The Roadrunner's Guide to English: Grammar and Vocabulary

Error Types and Grading Standards

The English Department of Dalton State College has developed a classification of grammatical and mechanical errors according to the seriousness of each error:  Type I errors are the most serious, Type II are of second rank, and Type III errors are the least serious.

Type I                                                                  

Sentence fragments

Fused or run-on sentences

Subject-Verb disagreement

Comma Splices


Type II

Pronoun case errors            

Disagreement of pronoun and antecedent

Verb tense sequence errors

Shifts in mood, number, person, voice of verbs

Dangling or misplaced modifiers     

Faulty parallelism

Ambiguous, broad, and/or vague reference of pronouns

 Use of second person in formal essay


Type III

Errors in mechanics



     Abbreviations and numbers


     Superfluous commas



     Quotation marks

     Period, question mark, exclamation point, colon, dash,

      parentheses, brackets


Errors in spelling and hyphenation 


Errors in usage




     Unity and logical thinking


     Separation of related sentence parts, split infinitive

     Sentence variety


     Planning and drafting

     Revising and editing      



Parts of Speech