1. CS - Capitalization and Spelling (大小写及拼写错误)
2. GR - Grammar (语法错误)
3. P - Punctuation (标点符号错误)
4. WO - Word Order (词序错误)
5. T - Tense (时态错误)
6. V - Verb (动词错误)
7. S - Subject-Verb Agreement (主谓一致错误)
8. R - Run-on Sentence (长句子错误)
9. FR - Fragment (断句错误)
10. AWK - Awkward (表达不恰当)
11. REP - Repetitive (表达重复)
12. CL - Clarity (表达不清晰)
13. TR - Transition (缺少过渡词)
14. CON - Connective (缺少连接词)
15. WC - Word Choice (词汇错误或不当)
16. ST - Style (风格不统一或不适宜)
17. CC - Coherence and Cohesion (连贯性和衔接性错误)
18. C - Content (内容错误或不恰当)
19. F - Format (格式错误)
20. AA - Academic Ability (学术能力不足)