In her book, Humor English Grammar: A Trouble-shooting Guide and Workbook, she has categorized common errors into 3 general types:
- Word-level errors: e.g., wrong verb form, wrong pronoun case, wrong word choice, wrong possessive case
- Sentence-level errors: e.g., fragment, fused sentence, comma splice, misplaced modifier, dangling modifier
- Inconsistency-based errors: pronoun shift, # shift, tense shift, mood shift, voice shift
She will post common errors for correction, systematically and consistently.
Hope you will participate and benefit from the grammar exercises.