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 had a picnic with my friends in a park. In the morning, it was sunny and we could hear brids singing in the trees. In the afternoon, it was rain and I didn't bring umbrella , I was get wet. I felt very cold and headache. My friends took me to a hospital, the doctor said I got fever. He gave some medicines to me and told me have a good rest at home.

Corrected essay:
Last Sunday, I had a picnic with my friends in a park. In the morning, it was sunny and we could hear birds singing in the trees. In the afternoon, it rained and I didn't bring an umbrella, so I got wet. I felt very cold and had a headache. My friends took me to a hospital, and the doctor said I had a fever. He gave some medicine to me and told me to have a good rest at home.

Error analysis:
error_sentence: In the morning, it was sunny and we could hear brids singing in the trees.
correct_sentence: In the morning, it was sunny and we could hear birds singing in the trees.
error: brids
correction: birds
error_type: Spelling Error
error_severity: 2
error_description: ① Spelling Error: According to the sentence meaning, the intended word here is 'birds'; the word 〈brids〉 is misspelled. Therefore, 〈brids〉 should be changed to 『birds』 so that the sentence can correctly express the meaning 'we could hear birds singing in the trees'.

error_sentence: In the afternoon, it was rain and I didn't bring umbrella , I was get wet.
correct_sentence: In the afternoon, it rained and I didn't bring an umbrella, so I got wet.
error: was rain
correction: rained
error_type: Verb Tense Error
error_severity: 3
error_description: ① Verb Tense Error: According to English grammar rules, the past tense of the verb should be used to describe actions that occurred in the past. The original sentence 'it was rain' uses an incorrect structure to describe the past weather change, which is a verb tense error. Here, 'rained' should be used to correctly express the past action 'it rained in the afternoon'.

error_sentence: In the afternoon, it was rain and I didn't bring umbrella , I was get wet.
correct_sentence: In the afternoon, it rained and I didn't bring an umbrella, so I got wet.
correction: an
error_type: Determiner Error
error_severity: 2
error_description: ① Determiner Error: According to English grammar rules, a singular countable noun usually requires an article when used generically. In the original sentence, 〈umbrella〉 is a singular countable noun, but it lacks a determiner when referring generically to 'an umbrella', which is a determiner error. The indefinite article 『an』 should be added before 〈umbrella〉 to make the sentence conform to English grammar norms.

error_sentence: In the afternoon, it was rain and I didn't bring umbrella , I was get wet.
correct_sentence: In the afternoon, it rained and I didn't bring an umbrella, so I got wet.
error: I was get
correction: so I got
error_type: Conjunction Error
error_severity: 5
error_description: ① Conjunction Error: According to English grammar rules, two independent clauses need to be connected by a conjunction to clarify the logical relationship. The original sentence lacks a conjunction between the two independent clauses, which is a conjunction error. Based on the context, the reason for getting wet was the rain and not having an umbrella. Therefore, the conjunction 『so』 should be added to indicate the cause-and-effect relationship, making the sentence logically coherent; ② Verb Tense Error: 'get wet' means 'to become wet'. Considering the past time context of the sentence, its past tense should be 'got wet'. The original phrase 'was get wet' has a confused structure and does not conform to grammatical rules; this is a verb tense error. 〈was get〉 should be changed to 『got』 to make the sentence grammatically correct and semantically logical.

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: 3
error_description: ① Verb Choice Error: According to English grammar rules, when expressing 'headache', 'headache' is often paired with 'have'. In the original sentence 〈I felt very cold and headache.〉, only 'felt' is used, which cannot fully express the meaning of 'headache'; this is a verb choice error. 〈had〉 should be added before 〈headache〉 to form 'have a headache', making the sentence structure complete, conforming to English expression habits, and accurately expressing 'I felt very cold and had a headache'; ② Determiner Error: According to English lexical norms, 'headache' requires the indefinite article 'a' before it, so 『a』 needs to be added.

error_sentence: My friends took me to a hospital, the doctor said I got fever.
correct_sentence: My friends took me to a hospital, and the doctor said I had a fever.
correction: and
error_type: Conjunction Error
error_severity: 4
error_description: ① Conjunction Error: According to English grammar rules, 〈My friends took me to a hospital〉 and 〈the doctor said I got fever〉 are two independent clauses with their own subject-verb structures that can stand alone as sentences. They cannot be connected only by a comma, as this would result in a comma splice error. The original sentence lacks a conjunction here, which is a conjunction error. The conjunction 『and』 should be added to make the sentence logically coherent.

error_sentence: My friends took me to a hospital, the doctor said I got fever.
correct_sentence: My friends took me to a hospital, and the doctor said I had a fever.
error: got
correction: had a
error_type: Verb Choice Error
error_severity: 3
error_description: ① Verb Choice Error: According to English expression habits, 'have a fever' is the fixed phrase used to express 'having a fever'. The original sentence uses 'got fever', which does not conform to the common expression; this is a verb choice error. Therefore, 〈got〉 should be changed to 〈had〉, and the indefinite article 〈a〉 should be added, resulting in 『had a fever』, to make the expression conform to English habits; ② Determiner Error: According to English lexical norms, 'fever' requires the indefinite article 'a' before it, so 『a』 needs to be added.

error_sentence: He gave some medicines to me and told me have a good rest at home.
correct_sentence: He gave some medicine to me and told me to have a good rest at home.
error: medicines
correction: medicine
error_type: Noun Number Error
error_severity: 3
error_description: ① Noun Number Error: According to English grammar rules, 'medicine' in this context means 'medication' and is an uncountable noun. The original sentence uses the plural form 〈medicines〉, which does not comply with its uncountable usage; this is a noun number error. 〈medicines〉 should be changed to the singular form 『medicine』 to conform to English expression habits.

error_sentence: He gave some medicines to me and told me have a good rest at home.
correct_sentence: He gave some medicine to me and told me to have a good rest at home.
correction: to
error_type: Nonfinite Verb Form Error
error_severity: 3
error_description: ① Nonfinite Verb Form Error: According to the fixed grammatical structure 'tell sb. to do sth.', 'tell' should be followed by 'to + base form of the verb'. The original phrase 〈told me have a good rest〉 does not follow this structure; this is a nonfinite verb form error. Therefore, 〈to〉 needs to be added before 〈have〉 to form 『to have a good rest』, making the sentence grammatically correct.