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 for a picnic with my friehds in park. Afternoon, the sky began raining, but I forgot to take an umbrella and I got wet. I felt very cold and headache. My friends took me to a hospital and the doctor told me I had a fever. He took some medicine to me and let me go home to had a rest.

Corrected essay:
Last Sunday, I went for a picnic with my friends in the park. In the afternoon, it began to rain, but I forgot to take an umbrella and I got wet. I felt very cold and had a headache. My friends took me to a hospital and the doctor told me I had a fever. He gave me some medicine and let me go home to have a rest.

Error analysis:
error_sentence: Last Sunday, I went for a picnic with my friehds in park.
correct_sentence: Last Sunday, I went for a picnic with my friends in the park.
error: friehds in
correction: friends in the
error_type: Determiner Error
error_severity: 3
error_description: ① Spelling Error: According to English spelling rules, 〈friehds〉 has incorrect letter order; the correct spelling should be 『friends』, the plural form of the noun meaning 'friends'. The original word is misspelled due to the misplaced 〈h〉 and needs correction to the standard spelling; ② Determiner Error: According to English grammar rules for definite articles, when the noun 〈park〉 refers to a specific place known to both speaker and listener, the definite article 『the』 must be added to form 『the park』. The original sentence lacks the necessary determiner, so 『the』 needs to be added to clarify the definite reference.

error_sentence: Afternoon, the sky began raining, but I forgot to take an umbrella and I got wet.
correct_sentence: In the afternoon, it began to rain, but I forgot to take an umbrella and I got wet.
error: Afternoon, the sky began raining
correction: In the afternoon, it began to rain
error_type: Nonfinite Verb Form Error
error_severity: 5
error_description: ① Preposition Error: According to English time expression norms, when the noun 〈Afternoon〉 functions as an adverbial of time for a specific period, it must be used with the prepositional phrase 『in the』 to form a complete structure. The original sentence lacks the necessary preposition and article, thus it is corrected to 『In the afternoon』 to comply with grammatical rules; ② Pronoun Error: According to English conventions for expressing weather, describing natural phenomena (like rain) requires the impersonal pronoun 〈it〉. Although 〈the sky〉 in the original sentence is literally plausible, it doesn't align with idiomatic English usage, hence the subject is replaced with 『it』; ③ Nonfinite Verb Form Error: According to English grammatical convention, 'begin to do sth.' is a fixed phrase, therefore it should be changed to 『it began to rain』.

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, when the noun 〈headache〉 is used to describe a symptom, it must form an object structure with the verb 〈have〉. The original sentence lacks a predicate verb, so 『had a』 is added before 〈headache〉 to form the complete expression 『had a headache』; ② Determiner Error: According to English noun usage norms, the singular countable noun 〈headache〉 must be preceded by a determiner. The original sentence lacks the indefinite article, so 『a』 needs to be added to form 『a headache』 to ensure grammatical completeness.

error_sentence: He took some medicine to me and let me go home to had a rest.
correct_sentence: He gave me some medicine and let me go home to have a rest.
error: took
correction: gave me
error_type: Verb Choice Error
error_severity: 4
error_description: ① Verb Choice Error: According to medical context expression norms, the verb 〈took〉 means 'to ingest' and describes the patient's own action. When the subject is the doctor, the verb of giving, 〈gave〉, should be used to accurately express the professional action of 'the doctor prescribing medicine', hence it is corrected to 『gave』; ② Pronoun Error: According to the grammatical rule for the ditransitive verb 'give sb. sth.' in English, 〈gave〉 must be followed by an indirect object (the recipient). The original sentence lacks the necessary object 『me』, so it is supplemented as 『gave me』, fully correcting to 『The doctor gave me some medicine』 to clearly express the act of giving medicine.

error_sentence: He took some medicine to me and let me go home to had a rest.
correct_sentence: He gave me some medicine and let me go home to have a rest.
error: to me
error_type: Word Redundancy Error
error_severity: 3
error_description: Word Redundancy Error: According to English grammar rules for ditransitive structures, the verb 〈gave〉 already fully expresses the recipient of the action through the indirect object 『me』; adding the prepositional phrase 〈to me〉 causes semantic repetition. Therefore, the redundant component 〈to me〉 is deleted, retaining the concise and effective ditransitive structure 『gave me』.

error_sentence: He took some medicine to me and let me go home to had a rest.
correct_sentence: He gave me some medicine and let me go home to have a rest.
error: had
correction: have
error_type: Nonfinite Verb Form Error
error_severity: 3
error_description: Nonfinite Verb Form Error: According to the basic rules of English infinitives, the infinitive marker 〈to〉 must be followed by the base form of the verb. The original sentence incorrectly uses the past tense 〈had〉 after 〈to〉, violating the infinitive structure norm, thus 〈had〉 is changed to the base form 『have』 to ensure structural correctness.