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, my friends and I were had a picture in the park. We flew a kite. In the afternoon, the weather was rainy, but I didn't broing my umbrella, so I got cold and headache. My friends took me to hospital, the doctor told me I had a fever. And he gave me some medicine and told me to had a rest at home.

Corrected essay:
Last Sunday, my friends and I had a picnic in the park. We flew a kite. In the afternoon, the weather was rainy, but I didn't bring my umbrella, so I got wet and had a headache. My friends took me to the hospital, and the doctor told me I had a fever. And he gave me some medicine and told me to have a rest at home.

Error analysis:
error_sentence: Last Sunday, my friends and I were had a picture in the park.
correct_sentence: Last Sunday, my friends and I had a picnic in the park.
error: were
error_type: Auxiliary Error
error_severity: 3
error_description: Auxiliary Error: In English, a complete sentence can only have one predicate. This sentence describes a past event using the simple past tense. 〈were had〉 is incorrect; the redundant 〈were〉 should be deleted, using 『had』 to form 『had a picnic』, meaning 'had a picnic'.

error_sentence: Last Sunday, my friends and I were had a picture in the park.
correct_sentence: Last Sunday, my friends and I had a picnic in the park.
error: picture
correction: picnic
error_type: Noun Error
error_severity: 3
error_description: Noun Error: According to the context, the sentence describes having a picnic in the park, but the original word 〈picture〉 means 'photo; drawing', which doesn't fit the context; this is a noun choice error. 〈picture〉 should be replaced with 『picnic』 to accurately express the activity 'picnic'.

error_sentence: In the afternoon, the weather was rainy, but I didn't broing my umbrella, so I got cold and headache.
correct_sentence: In the afternoon, the weather was rainy, but I didn't bring my umbrella, so I got wet and had a headache.
error: broing
correction: bring
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to the sentence meaning, the intention is to express 'it was rainy in the afternoon, but I didn't bring my umbrella', so 〈broing〉 is a misspelling of 『bring』. It needs to be corrected to 『bring』 for the sentence to make sense.

error_sentence: In the afternoon, the weather was rainy, but I didn't broing my umbrella, so I got cold and headache.
correct_sentence: In the afternoon, the weather was rainy, but I didn't bring my umbrella, so I got wet and had a headache.
error: cold and
correction: wet and had a
error_type: Verb Choice Error
error_severity: 3
error_description: ① Adjective Error: According to English expression habits and the sentence meaning, in the context of being in the rain without an umbrella, 'wet' accurately expresses the state of 'getting soaked', so 〈got cold〉 should be changed to 『got wet』; ② Verb Choice Error: According to English grammar rules, 'headache' is a noun, and expressing 'having a headache' requires the structure 'have a headache'. The original sentence lacks a verb paired with 〈headache〉, so 『had a』 needs to be added to form the complete expression, modifying it to 『had a headache』.

error_sentence: My friends took me to hospital, the doctor told me I had a fever.
correct_sentence: My friends took me to the hospital, and the doctor told me I had a fever.
correction: the
error_type: Determiner Error
error_severity: 2
error_description: Determiner Error: According to English grammar rules, the countable noun 〈hospital〉 requires a determiner when used alone. The original sentence is missing 〈the〉; 『the』 should be added to indicate a specific hospital.

error_sentence: My friends took me to hospital, the doctor told me I had a fever.
correct_sentence: My friends took me to the hospital, and the doctor told me I had a fever.
correction: and
error_type: Conjunction Error
error_severity: 4
error_description: Conjunction Error: According to English grammar rules, 〈My friends took me to the hospital〉 and 〈the doctor told me I had a fever〉 are two independent clauses, each containing its own subject and predicate and capable of standing alone as a sentence. Therefore, 『and』 needs to be added to connect them, making the sentence structure complete.

error_sentence: And he gave me some medicine and told me to had a rest at home.
correct_sentence: And he gave me some medicine and told me to have a rest at home.
error: had
correction: have
error_type: Nonfinite Verb Form Error
error_severity: 3
error_description: Nonfinite Verb Form Error: According to English grammar rules, the infinitive structure is 'to + base form of the verb'. The verb 〈had〉 incorrectly uses the past tense; it should be corrected to 『have』 to comply with the rule where the verb 〈told〉 is followed by an infinitive structure (tell sb. to do sth.).