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:
Oh No! Last Sunday, I had a picnic with my friend. Suddenly, there was rain and I doesn't bring an umbrella. So, I got wet. I felt very cold and headache. My bring me to hospital. The doctor said: “You are fever. " He gived me some medicines and let me have a good rest.

Corrected essay:
Oh No! Last Sunday, I had a picnic with my friend. Suddenly, there was rain and I didn't bring an umbrella. So, I got wet. I felt very cold and had a headache. My friends brought me to the hospital. The doctor said, "You have a fever." He gave me some medicine and let me have a good rest.

Error analysis:
error_sentence: Suddenly, there was rain and I doesn't bring an umbrella.
correct_sentence: Suddenly, there was rain and I didn't bring an umbrella.
error: does
correction: did
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: According to the prompt, 'Last Sunday' describes a past event, requiring the simple past tense; the original sentence uses 〈doesn't〉, which is simple present tense, and needs to be changed to the simple past tense 『didn't』 to fit the context.
error_sentence: I felt very cold and headache.
correct_sentence: I felt very cold and had a headache.
correction: had a
error_type: Verb Choice Error
error_severity: 4
error_description: ① Verb Choice Error: According to English grammar rules, a sentence requires a predicate; the original sentence 〈I felt very cold and headache〉 lacks a verb to describe the state of 〈headache〉, so 『had』 needs to be added to connect the subject and the noun to comply with English grammar rules; ② Determiner Error: According to English grammar rules, a singular countable noun must be preceded by an indefinite article; the original sentence lacks the necessary determiner 『a』 before 〈headache〉, therefore, the phrase is modified to 『had a headache』 to comply with English grammar rules.
error_sentence: My bring me to hospital.
correct_sentence: My friends brought me to the hospital.
error: bring
correction: friends brought
error_type: Verb Tense Error
error_severity: 5
error_description: ① Noun Error: According to English grammar rules, a sentence needs a subject; the original sentence lacks the core noun 『friends』 after 〈My〉, resulting in a missing subject, thus it needs to be modified to 『My friends』 to comply with English grammar rules; ② Verb Tense Error: According to the prompt, 'Last Sunday' describes a past event, requiring the simple past tense; the original sentence uses 〈bring〉, which is simple present tense, and needs to be changed to the simple past tense 『brought』 to fit the context.
error_sentence: My bring me to hospital.
correct_sentence: My friends brought me to the hospital.
correction: the
error_type: Determiner Error
error_severity: 2
error_description: Determiner Error: According to English grammar rules, the place noun 〈hospital〉 in the original sentence should refer to a specific place, thus requiring the definite article 『the』 before 〈hospital〉 to indicate specificity, hence modified to 『to the hospital』 to comply with English grammar rules.
error_sentence: The doctor said: “You are fever. "
correct_sentence: The doctor said, "You have a fever."
error: : “You are
correction: , "You have a
error_type: Verb Choice Error
error_severity: 5
error_description: ① Punctuation Error: According to English writing conventions, a comma, not a colon, should precede direct speech, and English punctuation should be used instead of Chinese symbols; therefore, 〈: “You〉 needs to be changed to 『, "You』 to comply with writing conventions; ② Verb Choice Error: According to English usage, the verb 'be' used alone means 'is/exists'; 〈are fever〉 does not conform to English usage and needs to be changed to 『have a fever』 to correctly express the state of having a fever.
error_sentence: He gived me some medicines and let me have a good rest.
correct_sentence: He gave me some medicine and let me have a good rest.
error: gived
correction: gave
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: Based on the sentence meaning, the past tense is intended here; therefore, 〈gived〉 is a misspelling of 『gave』 and needs to be corrected to 『gave』 for the sentence to make sense.
error_sentence: He gived me some medicines and let me have a good rest.
correct_sentence: He gave me some medicine and let me have a good rest.
error: medicines
correction: medicine
error_type: Noun Number Error
error_severity: 2
error_description: Noun Number Error: According to English usage, 〈medicines〉 as a countable noun refers to multiple types of drugs, while 『medicine』 as an uncountable noun refers to medication in general; the original sentence does not refer to multiple types of drugs, so it needs to be changed to the singular form 『medicine』 to conform to semantics and usage.