Writing prompt: Based on what you learned in this unit and the provided hints, use colors to describe your classmate's attire.
Writing hints: wear; shirt; shoes; beautiful; like

Student essay:
Hello, my name's Wang Dan. I am in Class 11 Grade 9. My classmate are friendly. Our monitor is a beautiful girl, she like wear white shirt and small white shoes. My favourite friend is a cute girl, she like wear pink dress, pinka and white shoes.

Corrected essay:
Hello, my name's Wang Dan. I am in Class 11, Grade 9. My classmates are friendly. Our monitor is a beautiful girl. She likes to wear a white shirt and small white shoes. My favourite friend is a cute girl. She likes to wear a pink dress and white shoes.

Error analysis:
error_sentence: I am in Class 11 Grade 9.
correct_sentence: I am in Class 11, Grade 9.
correction: ,
error_type: Punctuation Error
error_severity: 1
error_description: Punctuation Error: In the sentence 〈I am in Class 11 Grade 9〉, according to English usage conventions, a necessary comma is missing between the noun phrase 〈Class 11〉 indicating the class and the noun phrase 〈Grade 9〉 indicating the grade; therefore, 『,』 needs to be added to improve sentence readability and conform to English writing norms.

error_sentence: My classmate are friendly.
correct_sentence: My classmates are friendly.
error: classmate
correction: classmates
error_type: Noun Number Error
error_severity: 3
error_description: Noun Number Error: In the sentence 〈My classmate are friendly〉, the subject 〈classmate〉 is singular, but based on the context and the verb 〈are〉, the subject should be plural; therefore, the singular noun 〈classmate〉 is changed to the plural form 『classmates』 to maintain subject-verb agreement.

error_sentence: Our monitor is a beautiful girl, she like wear white shirt and small white shoes.
correct_sentence: Our monitor is a beautiful girl. She likes to wear a white shirt and small white shoes.
error: , she like wear
correction: . She likes to wear a
error_type: Subject-Verb Agreement Error
error_severity: 5
error_description: ① Punctuation Error: 〈Our monitor is a beautiful girl〉 and 〈she like wear white shirt and small white shoes〉 are two independent clauses; according to English writing norms, they should be separated by a period, so 〈,〉 is changed to 『.』; ② Subject-Verb Agreement Error: According to the English subject-verb agreement principle, in the sentence 〈she like wear white shirt and small white shoes〉, the subject 〈she〉 is third-person singular, so the verb 〈like〉 needs to be in the third-person singular form, changed to 『likes』; ③ Nonfinite Verb Form Error: Based on the English pattern 'like to do sth.' for expressing 'enjoy doing something', the verb 〈wear〉 needs to be in the infinitive form, so 『to』 should be added before 〈wear〉 to comply with grammatical rules; ④ Determiner Error: According to English grammar rules, the noun phrase 〈white shirt〉 lacks an article; 『a』 needs to be added to meet grammatical requirements.

error_sentence: My favourite friend is a cute girl, she like wear pink dress, pinka and white shoes.
correct_sentence: My favourite friend is a cute girl. She likes to wear a pink dress and white shoes.
error: , she like wear
correction: . She likes to wear a
error_type: Subject-Verb Agreement Error
error_severity: 5
error_description: ① Punctuation Error: 〈My favourite friend is a cute girl〉 and 〈she like wear pink dress, pinka and white shoes〉 are two independent clauses; according to English writing norms, they should be separated by a period, so 〈,〉 is changed to 『.』; ② Subject-Verb Agreement Error: According to the English subject-verb agreement principle, in the sentence 〈she like wear pink dress, pinka and white shoes 〉, the subject 〈she〉 is third-person singular, so the verb 〈like〉 needs to be in the third-person singular form, changed to 『likes』; ③ Nonfinite Verb Form Error: Based on the English pattern 'like to do sth.' for expressing 'enjoy doing something', the verb 〈wear〉 needs to be in the infinitive form, so 『to』 should be added before 〈wear〉 to comply with grammatical rules; ④ Determiner Error: According to English grammar rules, the countable noun 〈dress〉 lacks an article; therefore, 『a』 needs to be added to make the sentence more complete.

error_sentence: My favourite friend is a cute girl, she like wear pink dress, pinka and white shoes.
correct_sentence: She likes to wear a pink dress and white shoes.
error: , pinka
error_type: Word Redundancy Error
error_severity: 4
error_description: Word Redundancy Error: Based on the sentence meaning, 〈pinka〉 in the sentence is an invalid word and disrupts the coherence; the redundant element 『, pinka』 is deleted to improve the readability and conciseness of the sentence.