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 student. she name is pig . she vare beautiful. she uaslly wear whirt shoes and black shirtt in school. I like she.

Corrected essay:
This is my classmate. Her name is Pig. She is very beautiful. She usually wears white shoes and a black shirt at school. I like her.

Error analysis:
error_sentence: This is my student. she name is pig .
correct_sentence: This is my classmate. Her name is Pig.
error: student. she
correction: classmate. Her
error_type: Noun Error
error_severity: 3
error_description: ① Noun Error: Analyzing the context of personal relationships, 〈student〉 generally refers to the identity of a student, whereas the actual context requires expressing the specific relationship of a 'classmate'. Therefore, the generic noun 〈student〉 is replaced with the clearly defined relationship noun 『classmate』 to accurately reflect the specific semantic feature of 'same class'; ② Pronoun Error: According to English pronoun case rules, the nominative pronoun 〈she〉 can only function as a subject, while modifying a noun requires an adjective possessive pronoun. Therefore, the nominative pronoun 〈she〉 is corrected to the possessive form 『Her』 to comply with the grammatical requirement that the pronoun in a 'pronoun + noun' structure must be in the possessive form.

error_sentence: she name is pig . she vare beautiful.
correct_sentence: Her name is Pig. She is very beautiful.
error: pig . she vare
correction: Pig. She is very
error_type: Verb Choice Error
error_severity: 3
error_description: ① Case Error: According to English proper noun writing rules, the first letter of the name 〈pig〉 needs to be capitalized, changed to 『Pig』 to comply with the writing norms for proper nouns; ② Space Error: According to English written expression norms, no space is needed between the last word of a sentence and the ending punctuation mark, therefore 〈pig ,〉 should be changed to 『Pig.』 to comply with punctuation norms; ③ Case Error: According to English written expression norms, when the sentence is a complete independent clause, the first letter of the first word needs to be capitalized, therefore 〈she〉 should be changed to 『She』; ④ Verb Choice Error: According to English grammar rules, 〈she vare〉 lacks a linking verb to form a subject-predicate-object structure, therefore the linking verb 『is』 is added, modifying it to 『she is very』 to meet basic sentence pattern requirements; ⑤ Spelling Error: According to English vocabulary spelling norms, 〈vare〉 does not fit the context, it should actually be the adverb 『very』, so it is corrected to 『very』 to accurately express the meaning 'very'.

error_sentence: she uaslly wear whirt shoes and black shirtt in school.
correct_sentence: She usually wears white shoes and a black shirt at school.
error: she uaslly wear whirt
correction: She usually wears white
error_type: Subject-Verb Agreement Error
error_severity: 3
error_description: ① Case Error: According to English sentence writing rules, the first letter of the first word of a sentence needs to be capitalized, therefore the pronoun 〈she〉 is changed to 『She』 to comply with the capitalization norm for the beginning of a sentence; ② Spelling Error: According to English vocabulary spelling norms, 〈uaslly〉 is misspelled, it should be changed to the frequency adverb 『usually』, meaning 'usually'; ③ Subject-Verb Agreement Error: According to English grammar rules, the third-person singular subject 〈She〉 requires the third-person singular form of the verb, therefore 〈wear〉 is changed to 『wears』, corrected to [She wears] to maintain subject-verb agreement; ④ Spelling Error: According to English vocabulary spelling norms, 〈whirt〉 is a misspelling, it needs to be changed to 『white』 to correctly express the meaning 'white'.

error_sentence: she uaslly wear whirt shoes and black shirtt in school.
correct_sentence: She usually wears white shoes and a black shirt at school.
error: black shirtt in
correction: a black shirt at
error_type: Preposition Error
error_severity: 2
error_description: ① Determiner Error: According to English article usage rules, the singular countable noun 〈black shirtt〉 lacks a determiner, the indefinite article 『a』 should be added to form a complete noun phrase, therefore it is modified to 『a black shirt』 to comply with grammatical norms; ② Spelling Error: According to English vocabulary spelling norms, 〈shirtt〉 contains a spelling error, the correct form should be 『shirt』, meaning 'shirt'; ③ Preposition Error: According to English fixed collocation rules, to express 'at school (referring to the place generally)', the preposition 『at』 should be used instead of 『in』, therefore 〈in school〉 is changed to 『at school』 to comply with idiomatic usage.

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 the case rules for pronouns in English grammar, when a pronoun serves as an object in a sentence, the objective case form should be used. The nominative pronoun 〈she〉 in the original sentence does not meet the requirement for the object position, therefore it needs to be changed to the objective pronoun 『her』 to ensure the correctness of the sentence structure.