Writing prompt: Based on the given hints and referring to the picture, write a short essay.
Last Sunday, I went for a picnic in the park with my friends. It started raining in the afternoon. I forgot my umbrella and got wet. I felt cold and had a headache. My friends took me to the hospital. The doctor said I had a fever. He gave me some medicine and told me to go home and rest well.
Writing hints: picnic; rain; umbrella; get wet; hospital; fever; medicine.

Student essay:
Last Sunday, I has a picnic. In the afternoon, there are rain, bu I didn't bring umbrella. So I got wet. It make me very cold and headache. My friends bring me to the hospital. The doctor tell me I'm fever. He give me some medicines for me and let me have a good rest.

Corrected essay:
Last Sunday, I had a picnic. In the afternoon, there was rain, but I didn't bring an umbrella, so I got wet. It made me very cold and gave me a headache. My friends brought me to the hospital. The doctor told me I had a fever. He gave me some medicine and let me have a good rest.

Error analysis:
error_sentence: Last Sunday, I has a picnic.
correct_sentence: Last Sunday, I had a picnic.
error: has
correction: had
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: The time adverbial 〈Last Sunday〉 clearly indicates past time; the predicate verb should be in the past tense, so 〈has〉 is changed to 『had』 to maintain tense consistency.
error_sentence: In the afternoon, there are rain, bu I didn't bring umbrella.
correct_sentence: In the afternoon, there was rain, but I didn't bring an umbrella, so I got wet.
error: are
correction: was
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: Based on the context, this describes events from last Sunday; the predicate verb should be in the past tense, and following the principle of subject-verb agreement, 〈are〉 needs to be changed to 『was』 to maintain tense and subject-verb agreement.
error_sentence: In the afternoon, there are rain, bu I didn't bring umbrella.
correct_sentence: In the afternoon, there was rain, but I didn't bring an umbrella, so I got wet.
error: bu
correction: but
error_type: Spelling Error
error_severity: 1
error_description: Spelling Error: According to the sentence meaning, the intention here is to express 'but', so 〈bu〉 is a misspelling of 『but』; 〈bu〉 needs to be changed to 『but』 for the sentence to make sense.
error_sentence: In the afternoon, there are rain, bu I didn't bring umbrella. So I got wet.
correct_sentence: In the afternoon, there was rain, but I didn't bring an umbrella, so I got wet.
error: umbrella. So
correction: an umbrella, so
error_type: Determiner Error
error_severity: 3
error_description: ① Determiner Error: 〈umbrella〉 is a singular countable noun starting with a vowel sound, so the article 『an』 should be added before 〈umbrella〉 to comply with grammatical rules; ② Punctuation Error: Clauses with a cause-and-effect relationship should be connected by a comma, so 〈. So〉 is changed to 『, so』 to reflect the logical relationship.
error_sentence: It make me very cold and headache.
correct_sentence: It made me very cold and gave me a headache.
error: make
correction: made
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: According to the context, the entire passage narrates past events; the predicate verb should maintain consistent tense, so 〈make〉 is changed to the past tense 『made』 to keep the timeline consistent.
error_sentence: It make me very cold and headache.
correct_sentence: It made me very cold and gave me a headache.
correction: gave me a
error_type: Verb Choice Error
error_severity: 3
error_description: Verb Choice Error: The original sentence lacks the specific action verb 『gave』 to express the onset of the headache; therefore, 『gave me a』 is added before 〈headache〉 to fully convey the meaning 'gave me a headache'.
error_sentence: My friends bring me to the hospital.
correct_sentence: My friends brought me to the hospital.
error: bring
correction: brought
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: According to the context, the entire passage narrates past events; the predicate verb should maintain consistent tense, so 〈bring〉 is changed to the past tense 『brought』 to keep the timeline consistent.
error_sentence: The doctor tell me I'm fever.
correct_sentence: The doctor told me I had a fever.
error: tell
correction: told
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: According to the context, the entire passage narrates past events; the predicate verb should maintain consistent tense, so 〈tell〉 is changed to the past tense 『told』 to keep the timeline consistent.
error_sentence: The doctor tell me I'm fever.
correct_sentence: The doctor told me I had a fever.
error: 'm
correction: had a
error_type: Verb Choice Error
error_severity: 3
error_description: Verb Choice Error: Following 〈I'm〉 with the noun 〈fever〉 does not conform to English expression habits; 『had a fever』 should be used to indicate the state of being ill, so 〈'm〉 is deleted and 『had a』 is added after 〈I〉 to correctly express 'I had a fever'.
error_sentence: He give me some medicines for me and let me have a good rest.
correct_sentence: He gave me some medicine and let me have a good rest.
error: give
correction: gave
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: According to the context, the entire passage narrates past events; the predicate verb should maintain consistent tense, so 〈give〉 is changed to the past tense 『gave』 to keep the timeline consistent.
error_sentence: He give me some medicines for me and let me have a good rest.
correct_sentence: He gave me some medicine and let me have a good rest.
error: medicines for me
correction: medicine
error_type: Word Redundancy Error
error_severity: 4
error_description: ① Noun Number Error: 『medicine』 as an uncountable noun refers to medication in general and does not need to be pluralized, so 〈medicines〉 is changed to 『medicine』; ② Word Redundancy Error: 〈for me〉 is semantically redundant with the preceding 〈give me〉, so 〈for me〉 is deleted.