Writing prompt: Using the given vocabulary and sentence patterns, and referring to the picture, write a short essay. Assume you are Tina; introduce your Monday routine to everyone. Writing hints: get up; have breakfast; go to school; begin; have lunch; go home.

Student essay:
Hello! I'm Tina! On Monday, I'm very busy. I have 8 lessons every day. My class starts at 8:35. So I get up at 7:00. I have breakfast at 7:15. I go to school at 7:45. Begin class, I often go to school library. I have lunch at 12:00. The class is over, I go home at 4:50. After class, I play with my cat coal. I'm very busy but happy!

Corrected essay:
Hello! I'm Tina! On Monday, I'm very busy. I have 8 lessons every day. My class starts at 8:35 a.m., so I get up at 7:00 a.m. I have breakfast at 7:15 a.m. I go to school at 7:45 a.m. Before class begins, I often go to the school library. I have lunch at 12:00. The class is over, and I go home at 16:50. After class, I play with my cat Coal. I'm very busy but happy!

Error analysis:
error_sentence: My class starts at 8:35. So I get up at 7:00.
correct_sentence: My class starts at 8:35 a.m., so I get up at 7:00 a.m.
error: . So
correction: a.m., so
error_type: Noun Error
error_severity: 4
error_description: ① Noun Error: According to English time expression conventions, the numerical time 〈8:35〉 is incomplete and requires a time identifier to specify the period. Based on the context, it is inferred to be morning time, so 『a.m.』 should be added after the number, modifying it to 『8:35 a.m.』 to conform to standard written format; ② Punctuation Error: According to English compound sentence writing conventions, 〈. So〉 has two issues: first, the misuse of a period breaks the logical connection, and second, the capitalization disrupts sentence flow. Therefore, the period should be changed to a comma 〈,〉 and 『so』 should remain lowercase, combining with the preceding time expression to form 『8:35 a.m., so』, ensuring proper connection between the clauses.

error_sentence: So I get up at 7:00.
correct_sentence: My class starts at 8:35 a.m., so I get up at 7:00 a.m.
error: .
correction: a.m.
error_type: Noun Error
error_severity: 3
error_description: Noun Error: According to English time expression conventions, the numerical time 〈7:00〉 is incomplete and requires a time identifier to specify the period. Based on the context, it is inferred to be morning time, so 『a.m.』 should be added after the number, modifying it to 『7:00 a.m.』 to conform to standard written format.

error_sentence: I have breakfast at 7:15.
correct_sentence: I have breakfast at 7:15 a.m.
error: .
correction: a.m.
error_type: Noun Error
error_severity: 3
error_description: Noun Error: According to English time expression conventions, the numerical time 〈7:15〉 is incomplete and requires a time identifier to specify the period. Based on the context, it is inferred to be morning time, so 『a.m.』 should be added after the number, modifying it to 『7:15 a.m.』 to conform to standard written format.

error_sentence: I go to school at 7:45. Begin class, I often go to school library.
correct_sentence: I go to school at 7:45 a.m. Before class begins, I often go to the school library.
error: . Begin class
correction: a.m. Before class begins
error_type: Sentence Structure Error
error_severity: 4
error_description: ① Noun Error: According to English time expression conventions, the numerical time 〈7:45〉 must be paired with a period identifier to form a complete expression. Since the context usually refers to morning class time, the suffix 『a.m.』 needs to be added, modifying it to 『7:45 a.m.』 to comply with standard written English format; ② Sentence Structure Error: According to basic English sentence pattern rules, the phrase 〈Begin class〉 has a severe structural deficiency, lacking a clear subject-verb structure. Considering its function as a time adverbial in the context, a logical subject should be added and the structure adjusted, modifying it to the time adverbial clause 『Before class begins』, which retains the original meaning while satisfying grammatical requirements.

error_sentence: Begin class, I often go to school library.
correct_sentence: Before class begins, I often go to the school library.
correction: the
error_type: Determiner Error
error_severity: 2
error_description: Determiner Error: According to English article usage rules, the noun phrase 〈school library〉 requires a definite article when referring to a specific place. Since it clearly refers to a specific library known to both parties (not just any school library), 『the』 must be added to form 『the school library』, complying with the grammatical rule of using the definite article for specific nouns.

error_sentence: The class is over, I go home at 4:50.
correct_sentence: The class is over, and I go home at 16:50.
correction: and
error_type: Conjunction Error
error_severity: 3
error_description: Conjunction Error: According to English coordinate sentence writing conventions, the necessary conjunction is missing between the two independent clauses 〈The class is over〉 and 〈I go home〉. The coordinating conjunction 『and』 must be added to form 『The class is over, and I go home』 to maintain sentence coherence.

error_sentence: The class is over, I go home at 4:50.
correct_sentence: The class is over, and I go home at 16:50.
error: 4:50
correction: 16:50
error_type: Number Error
error_severity: 3
error_description: Number Error: According to stylistic requirements, and given the context uses the 24-hour format, the numerical time 〈4:50〉 is ambiguous (could mean 04:50 or 16:50). It needs to be uniformly converted to the 24-hour format 『16:50』 to avoid ambiguity.

error_sentence: After class, I play with my cat coal.
correct_sentence: After class, I play with my cat Coal.
error: coal
correction: Coal
error_type: Spelling Error
error_severity: 1
error_description: Spelling Error: According to English proper noun capitalization rules, the pet name 〈coal〉, as the name of a specific individual, must have its first letter capitalized. It should be corrected to 『Coal』 to conform to English writing conventions.