Writing prompt: Our New Classmate

Student essay:
Our new pupil jack,comes from American. He is handsome young boy with thick classes and is of plump. He becomes popular among the students because he is humorous and outgoing. And he is very enthusiastic. When we had trouble of English,we will find him because. He's really willing to help us. He speak very fluently,so we have a very great communication with him. He plays basketball very well so we are willing to play with him. He is very serious about learning But we believe that he makes great progress by his own effort and our help. we really like hi. He's been the best.

Corrected essay:
Our new pupil Jack comes from America. He is a handsome young boy with thick glasses and is plump. He becomes popular among the students because he is humorous and outgoing. And he is very enthusiastic. When we have trouble with English, we will find him because he's really willing to help us. He speaks very fluently, so we have great communication with him. He plays basketball very well so we are willing to play with him. He is very serious about learning, but we believe that he makes great progress through his own effort and our help. We really like him. He's been the best.

Error analysis:
error_sentence: Our new pupil jack,comes from American.
correct_sentence: Our new pupil Jack comes from America.
error: jack,
correction: Jack
error_severity: 2
error_description: ① Case Error: According to English writing conventions, the first letter of proper nouns needs to be capitalized; 〈jack〉 is a proper noun representing a name, so it needs to be changed to 『Jack』 to conform to the convention; ② Punctuation Error: The comma here is redundant and disrupts the sentence structure, so 〈,〉 is deleted to correctly express the meaning.
error_sentence: Our new pupil jack,comes from American.
correct_sentence: Our new pupil Jack comes from America.
error: American
correction: America
error_type: PoS Confusion Error
error_severity: 3
error_description: PoS Confusion Error: 〈American〉 is an adjective form; here it means '美国' (America), so the noun form 『America』 should be used; therefore, 〈American〉 is changed to 『America』 to conform to the semantics.
error_sentence: He is handsome young boy with thick classes and is of plump.
correct_sentence: He is a handsome young boy with thick glasses and is plump.
correction: a
error_type: Determiner Error
error_severity: 2
error_description: Determiner Error: The singular countable noun 〈handsome young boy〉 lacks an article for modification, so 『a』 is added before 〈handsome〉 to conform to English grammar rules.
error_sentence: He is handsome young boy with thick classes and is of plump.
correct_sentence: He is a handsome young boy with thick glasses and is plump.
error: classes
correction: glasses
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to the sentence meaning, it is understood that '眼镜' (glasses) is intended here, so 〈classes〉 is a misspelling of 『glasses』; it needs to be changed to 『glasses』 to make the sentence meaning smooth.
error_sentence: He is handsome young boy with thick classes and is of plump.
correct_sentence: He is a handsome young boy with thick glasses and is plump.
error: of
error_type: Word Redundancy Error
error_severity: 2
error_description: Word Redundancy Error: The adjective 〈plump〉 can directly serve as a predicative without needing to be connected by 〈of〉, so 『of』 is deleted to conform to grammar rules.
error_sentence: When we had trouble of English,we will find him because.
correct_sentence: When we have trouble with English, we will find him because he's really willing to help us.
error: had trouble of
correction: have trouble with
error_type: Verb Tense Error
error_severity: 4
error_description: ① Verb Tense Error: Considering the context, it is known that the tense here is the simple present tense, so 〈had〉 is changed to 『have』 to maintain tense consistency; ② Preposition Error: The fixed phrase 『have trouble with』 means 'to have difficulty in some aspect', so 〈of〉 is changed to 『with』 to conform to idiomatic expression.
error_sentence: When we had trouble of English,we will find him because. He's really willing to help us.
correct_sentence: When we have trouble with English, we will find him because he's really willing to help us.
error: . He
correction: he
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: The adverbial clause of reason introduced by 〈because〉 cannot stand as an independent sentence and needs to be connected to the main clause, so 〈. He〉 is changed to 『he』 to make the meaning coherent.
error_sentence: He speak very fluently,so we have a very great communication with him.
correct_sentence: He speaks very fluently, so we have great communication with him.
error: speak
correction: speaks
error_type: Subject-Verb Agreement Error
error_severity: 3
error_description: Subject-Verb Agreement Error: The subject 〈He〉 is third-person singular and needs to be paired with the third-person singular form of the verb, so 〈speak〉 is changed to 『speaks』 to conform to subject-verb agreement rules.
error_sentence: He speak very fluently,so we have a very great communication with him.
correct_sentence: He speaks very fluently, so we have great communication with him.
error: a very
error_type: Word Redundancy Error
error_severity: 3
error_description: Word Redundancy Error: 〈communication〉 is an uncountable noun and cannot be used with an indefinite article, so 〈a very〉 is deleted to standardize the sentence structure.
error_sentence: He is very serious about learning But we believe that he makes great progress by his own effort and our help.
correct_sentence: He is very serious about learning, but we believe that he makes great progress through his own effort and our help.
error: But
correction: , but
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: When the conjunction 〈But〉 connects two independent clauses, a comma needs to be added at the end of the preceding clause, so 〈But〉 is changed to 『, but』 to standardize the sentence structure.
error_sentence: He is very serious about learning But we believe that he makes great progress by his own effort and our help.
correct_sentence: He is very serious about learning, but we believe that he makes great progress through his own effort and our help.
error: by
correction: through
error_type: Preposition Error
error_severity: 2
error_description: Preposition Error: To express 'by some means' or 'through some way', 『through』 should be used, so 〈by〉 is changed to 『through』 to conform to idiomatic expression.
error_sentence: we really like hi.
correct_sentence: We really like him.
error: we
correction: We
error_type: Case Error
error_severity: 1
error_description: Case Error: According to English writing conventions, the first letter of a word at the beginning of a sentence needs to be capitalized, so 〈we〉 needs to be changed to 『We』 to conform to the convention.
error_sentence: we really like hi.
correct_sentence: We really like him.
error: hi
correction: him
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to the sentence meaning, it is understood that '他' (him) is intended here, so 〈hi〉 is a misspelling of 『him』; it needs to be changed to 『him』 to make the sentence meaning smooth.