Writing prompt: Written Expression.
Using the given vocabulary and sentence patterns, and referring to the picture, write a short essay.
Based on the information provided by Tom below, and referring to the picture, describe Tom's activities for next weekend using the simple future tense:
Writing hints:
On Saturday: do his homework 9:30; watch TV 11:00; go to the park in the afternoon
On Sunday: clean his room 10:00; play basketball 14:00; have a bath 18:00

Student essay:
On saturday, Tom is going to do his homework at 9:30 and watch TV at 11:00. He is going to go to the park in the afternoon. On sunday, he is going to clean his room at 10:00. He is going to play basketball at 14:00. He is going to have a bath at 18:00. Tom is very busy next week.

Corrected essay:
On Saturday, Tom is going to do his homework at 9:30 a.m. and watch TV at 11:00 a.m. He is going to go to the park in the afternoon. On Sunday, he is going to clean his room at 10:00 a.m. He is going to play basketball at 14:00. He is going to have a bath at 18:00. Tom will be very busy next week.

Error analysis:
error_sentence: On saturday, Tom is going to do his homework at 9:30 and watch TV at 11:00.
correct_sentence: On Saturday, Tom is going to do his homework at 9:30 a.m. and watch TV at 11:00 a.m.
error: saturday
correction: Saturday
error_type: Case Error
error_severity: 1
error_description: Case Error: According to English writing conventions, proper nouns should be capitalized; 〈saturday〉 is a proper noun meaning 'Saturday', so it needs to be changed to 『Saturday』 to comply with the rules.

error_sentence: On saturday, Tom is going to do his homework at 9:30 and watch TV at 11:00.
correct_sentence: On Saturday, Tom is going to do his homework at 9:30 a.m. and watch TV at 11:00 a.m.
correction: a.m.
error_type: Noun Error
error_severity: 2
error_description: Noun Error: According to English expression conventions, 'a.m.' or 'p.m.' is usually added after the time to indicate morning or afternoon; here, 『a.m.』 needs to be added after the time expression 〈9:30〉 to clarify the time.

error_sentence: On saturday, Tom is going to do his homework at 9:30 and watch TV at 11:00.
correct_sentence: On Saturday, Tom is going to do his homework at 9:30 a.m. and watch TV at 11:00 a.m.
error: .
correction: a.m.
error_type: Noun Error
error_severity: 2
error_description: Noun Error: According to English expression conventions, 'a.m.' or 'p.m.' is usually added after the time to indicate morning or afternoon; here, 『a.m.』 needs to be added after the time expression 〈11:00〉 to clarify the time.

error_sentence: On sunday, he is going to clean his room at 10:00.
correct_sentence: On Sunday, he is going to clean his room at 10:00 a.m.
error: sunday
correction: Sunday
error_type: Case Error
error_severity: 1
error_description: Case Error: According to English writing conventions, proper nouns should be capitalized; 〈sunday〉 is a proper noun meaning 'Sunday', so it needs to be changed to 『Sunday』 to comply with the rules.

error_sentence: On sunday, he is going to clean his room at 10:00.
correct_sentence: On Sunday, he is going to clean his room at 10:00 a.m.
error: .
correction: a.m.
error_type: Noun Error
error_severity: 2
error_description: Noun Error: According to English expression conventions, 'a.m.' or 'p.m.' is usually added after the time to indicate morning or afternoon; here, 『a.m.』 needs to be added after the time expression 〈10:00〉 to clarify the time.

error_sentence: Tom is very busy next week.
correct_sentence: Tom will be very busy next week.
error: is
correction: will be
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: According to the prompt requirements, 'next weekend' describes future events and should use the simple future tense; the original sentence uses 〈is〉, which is the simple present tense, so 〈is〉 needs to be changed to the simple future tense 『will be』 to fit the context.