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:
This is my school. My school is a big and old. I have mang classmates. Amy is my best friend. she wear is a pink shirt. it is very beautiful. She shoes is yellow. I like she.

Corrected essay:
This is my school. My school is big and old. I have many classmates. Amy is my best friend. She wears a pink shirt. It is very beautiful. Her shoes are yellow. I like her.

Error analysis:
error_sentence: My school is a big and old.
correct_sentence: My school is big and old.
error: a
error_type: Determiner Error
error_severity: 2
error_description: Determiner Error: According to English grammar rules, the adjective phrase 〈big and old〉 used as a predicative does not require an article; in the original sentence 〈My school is a big and old〉, 〈a〉 is a redundant determiner and constitutes a determiner error, needing removal to comply with English grammar rules.

error_sentence: I have mang classmates.
correct_sentence: I have many classmates.
error: mang
correction: many
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to the sentence's meaning, the intention here is to express 'many'; therefore, 〈mang〉 is a misspelling of 『many』, requiring correction to 『many』 to make the sentence coherent.

error_sentence: she wear is a pink shirt.
correct_sentence: She wears a pink shirt.
error: she wear is
correction: She wears
error_type: Subject-Verb Agreement Error
error_severity: 4
error_description: ① Case Error: According to English writing conventions, the first letter of the word starting a sentence needs to be capitalized; therefore, 〈she〉 in the original sentence should be changed to 『She』; ② Subject-verb Agreement Error: According to the principle of subject-verb agreement, the third-person singular subject 〈She〉 requires the third-person singular verb form 『wears』; in the original sentence 〈she wear is a pink shirt〉, 〈wear〉 is not in the singular form, and the structure is confusing, indicating a subject-verb agreement error; 〈she wear is〉 needs to be changed to 『She wears』 to comply with grammatical rules; ③ Auxiliary Error: According to English grammar rules, a sentence should only have one main verb; the redundant verb 〈is〉 here disrupts sentence coherence, constituting word redundancy; 〈she wear is〉 needs to be changed to 『She wears』 to comply with grammatical rules.

error_sentence: it is very beautiful.
correct_sentence: It is very beautiful.
error: it
correction: It
error_type: Case Error
error_severity: 1
error_description: Case Error: According to English writing conventions, the first letter of the word starting a sentence must be capitalized; in the original sentence, the initial pronoun 〈it〉 is not capitalized, which is a case error. 〈it〉 should be changed to 『It』 to comply with English writing conventions.

error_sentence: She shoes is yellow.
correct_sentence: Her shoes are yellow.
error: She shoes is
correction: Her shoes are
error_type: Subject-Verb Agreement Error
error_severity: 3
error_description: ① Pronoun Error: 〈She〉 needs to be changed to the possessive pronoun 『Her』 to indicate possession, meaning 'her'; ② Subject-verb Agreement Error: According to English grammar rules, a plural subject requires a plural verb; here the subject is 〈shoes〉, so the linking verb should be 『are』.

error_sentence: I like she.
correct_sentence: I like her.
error: she
correction: her
error_type: Pronoun Error
error_severity: 3
error_description: Pronoun Error: According to English grammar rules, the object following the verb 〈like〉 requires the objective case of the pronoun; in the original sentence 〈I like she〉, 〈she〉 is a nominative pronoun, which is a pronoun error; 〈she〉 needs to be changed to 『her』 to maintain grammatical correctness.