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 went to the park with my friends. We had a picnic there. In the morning, the weather was sunny. But in the afternoon, the weather became rain. I didn't take an umbrella. I got wet, and I feeled cold and headache. My friends taked me to haspital. The doctor said, "You have a fever. You should have a good rest. "Then, he gave me the medicine

Corrected essay:
Last Sunday, I went to the park with my friends. We had a picnic there. In the morning, the weather was sunny. But in the afternoon, the weather became rainy. I didn't take an umbrella. I got wet, and I felt cold and had a headache. My friends took me to the hospital. The doctor said, "You have a fever. You should have a good rest." Then, he gave me the medicine.

Error analysis:
error_sentence: But in the afternoon, the weather became rain.
correct_sentence: But in the afternoon, the weather became rainy.
error: rain
correction: rainy
error_type: Adjective Error
error_severity: 3
error_description: Adjective Error: According to English grammar rules, the linking verb 〈became〉 should be followed by an adjective as a predicative. Therefore, there is an adjective error here. The noun form 〈rain〉 needs to be changed to the adjective 『rainy』 to represent the weather condition, conforming to the context and English grammar rules.

error_sentence: I got wet, and I feeled cold and headache.
correct_sentence: I got wet, and I felt cold and had a headache.
error: feeled
correction: felt
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to the context, the original text is in the simple past tense; the base form of the verb in a past event should be changed to the simple past tense. The past tense spelling of the verb 'feel' is an irregular form, correctly written as 'felt'. Therefore, there is a spelling error here. The incorrect spelling 〈feeled〉 needs to be changed to 『felt』 to conform to the context's tense and English spelling conventions.

error_sentence: I got wet, and I feeled cold and headache.
correct_sentence: I got wet, and I felt cold and had a headache.
correction: had a
error_type: Sentence Structure Error
error_severity: 5
error_description: ① Sentence Structure Error: According to the English fixed phrase, the verb phrase 'have a headache' means '头痛'. The original sentence lacks the corresponding predicate verb, leading to an incomplete sentence structure; there is a sentence structure error. It is necessary to add 『had』 before 〈headache〉 to supply the predicate verb; ② Determiner Error: According to the English fixed phrase, the correct expression for '头痛' is 'have a headache'. Here, 〈headache〉 is a singular countable noun, thus requiring an article for determination. It is necessary to add 『a』 before 〈headache〉 to comply with English fixed phrases and grammar rules.

error_sentence: My friends taked me to haspital.
correct_sentence: My friends took me to the hospital.
error: taked
correction: took
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to the context, the original text is in the simple past tense; the base form of the verb in a past event should be changed to the simple past tense. The past tense spelling of the verb 'take' is an irregular form, correctly written as 'took'. Therefore, there is a spelling error here. The incorrect spelling 〈taked〉 needs to be changed to 『took』 to conform to the context's tense and English spelling conventions.

error_sentence: My friends taked me to haspital.
correct_sentence: My friends took me to the hospital.
error: haspital
correction: the hospital
error_type: Determiner Error
error_severity: 5
error_description: ① Spelling Error: According to English spelling conventions, the correct spelling for the word '医院' is 'hospital'. Therefore, there is a spelling error here. The incorrect spelling 〈haspital〉 needs to be changed to 『hospital』 to comply with English spelling conventions; ② Determiner Error: According to English grammar rules, a singular countable noun requires a definite article when it refers to something specific. Therefore, it is necessary to add the definite article 『the』 before 〈hospital〉 to indicate a specific hospital, conforming to the context and English grammar rules.

error_sentence: "Then, he gave me the medicine
correct_sentence: Then, he gave me the medicine.
correction: .
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: According to English syntax rules, the end of an independent sentence requires appropriate punctuation to mark its conclusion. The original sentence lacks a period at the end, thus there is a punctuation omission error. It is necessary to add 『.』 after 〈medicine〉 to mark the end of the sentence, complying with English syntax rules.