Writing prompt: My Room

Student essay:
I have a gond room.It's very big.I'm tidy.My keys in my schoolbag ahd my schoolbag under the bed.My computer on the desk.I have a big bed.I have a clock.it's on the desk.I love it.

Corrected essay:
I have a good room. It's very big. I'm tidy. My keys are in my schoolbag and my schoolbag is under the bed. My computer is on the desk. I have a big bed. I have a clock. It's on the desk. I love it.

Error analysis:
error_sentence: I have a gond room.
correct_sentence: I have a good room.
error: gond
correction: good
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to English spelling conventions, the intended meaning here is “good”, thus 〈gond〉 is a misspelling of 『good』. Pay attention to the correct use of the letter combination 〈oo〉 in this word; change 〈gond〉 to 『good』 to conform to standard spelling.

error_sentence: I'm tidy.
correct_sentence: I'm tidy.
error: I'm
correction: I'm
error_type: Other Error
error_description: Other Error: Over-correction, no actual error.

error_sentence: My keys in my schoolbag ahd my schoolbag under the bed.
correct_sentence: My keys are in my schoolbag and my schoolbag is under the bed.
correction: are
error_type: Sentence Structure Error
error_severity: 3
error_description: Sentence Structure Error: According to English grammar rules, the plural subject 〈keys〉 requires the linking verb 『are』 to form a subject-verb agreement structure. The original sentence lacks a predicate verb, so 『are』 is added to make the sentence structure complete.

error_sentence: My keys in my schoolbag ahd my schoolbag under the bed.
correct_sentence: My keys are in my schoolbag and my schoolbag is under the bed.
error: ahd
correction: and
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to English spelling conventions, to express the correct coordinating conjunction here, 〈ahd〉 is a misspelling of 『and』. 〈ahd〉 needs to be changed to 『and』 to conform to standard spelling.

error_sentence: My keys in my schoolbag ahd my schoolbag under the bed.
correct_sentence: My keys are in my schoolbag and my schoolbag is under the bed.
correction: is
error_type: Sentence Structure Error
error_severity: 3
error_description: Sentence Structure Error: According to English grammar rules, the original sentence lacks a predicate verb; the singular subject 〈schoolbag〉 requires the linking verb 『is』 to form a subject-verb agreement structure, so 『is』 is added to make the sentence structure complete.

error_sentence: My computer on the desk.
correct_sentence: My computer is on the desk.
correction: is
error_type: Sentence Structure Error
error_severity: 3
error_description: Sentence Structure Error: According to English grammar rules, the original sentence lacks a predicate verb; the singular subject 〈computer〉 requires the linking verb 『is』 to form a subject-verb agreement structure, so 『is』 is added to make the sentence structure complete.

error_sentence: I have a clock.it's on the desk.
correct_sentence: I have a clock. It's on the desk.
error: clock.it
correction: clock. It
error_type: Space Error
error_severity: 2
error_description: ① Space Error: According to English writing conventions, a space should be added after the period in 〈clock.it〉 to separate sentences. Therefore, 〈clock.it〉 is changed to 『clock. It』 to ensure correct punctuation usage; ② Case Error: According to English grammar rules, the first letter of the first word in a sentence should be capitalized. The first letter of the second sentence 〈it〉 should be changed to 『It』 (capitalized first letter) to conform to sentence-initial writing conventions.