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:
It is my classmate , he like wear pure white shirt. And beautiful shoes.

Corrected essay:
This is my classmate. He likes to wear a pure white shirt and beautiful shoes.

Error analysis:
error_sentence: It is my classmate , he like wear pure white shirt.
correct_sentence: This is my classmate.
error: It
correction: This
error_type: Pronoun Error
error_severity: 3
error_description: ① Pronoun Error: According to English grammar rules and conventions, 'it' typically refers to things, while the demonstrative pronoun 'this' is commonly used when introducing a specific person. In the original sentence, using 'it' to refer to a classmate is inconsistent with grammar and logical expression, constituting a pronoun error. Therefore, 〈It〉 should be changed to 『This』, using the "This is..." structure to correctly introduce the classmate, making the sentence conform to English expression norms.

error_sentence: It is my classmate , he like wear pure white shirt.
correct_sentence: This is my classmate. He likes to wear a pure white shirt and beautiful shoes.
error: , he like wear
correction: . He likes to wear a
error_type: Sentence Structure Error
error_severity: 4
error_description: ① Punctuation Error: In English, two independent clauses cannot be joined solely by a comma. In the original sentence, 〈It is my classmate〉 and 〈he like wear pure white shirt〉 are two independent clauses connected only by a comma, which violates grammatical rules. 〈, he〉 should be changed to 『. He』 to ensure correct sentence structure; ② Subject-Verb Agreement Error: When the subject of a sentence is a third-person singular pronoun like 〈he〉, the present tense verb must take the third-person singular form. In the original sentence, the subject 〈he〉 is third-person singular, but the verb 〈like〉 is not in its third-person singular form 〈likes〉, causing a subject-verb disagreement. 〈like〉 should be changed to 『likes』; ③ Nonfinite Verb Form Error: In English, when 'like' is followed by a verb, the common structure is 'like to + base form of the verb'. The original phrase 〈like wear〉 does not follow this pattern. 『to』 should be added before 〈wear〉 to form 『like to wear』, correcting the nonfinite verb form; ④ Determiner Error: According to English grammar rules, a singular countable noun used generically usually requires an indefinite article. In the original sentence, 〈shirt〉 is a singular countable noun referring to one shirt in general, but it lacks a determiner. 『a』 should be added before 〈shirt〉 to comply with grammatical norms.

error_sentence: It is my classmate , he like wear pure white shirt. And beautiful shoes.
correct_sentence: He likes to wear a pure white shirt and beautiful shoes.
error: . And
correction: and
error_type: Punctuation Error
error_severity: 3
error_description: ① Punctuation Error: According to English grammar rules, when the conjunction 'and' is used to connect parallel elements, it should directly follow the preceding element without being separated by a period. 〈. And〉 needs to be changed to 『and』 to comply with English punctuation and capitalization rules.