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 weekend. I went to picnic in the park with my friends. That afternoon. Suddenly begin rain. I forgeted bring an umbrella. I was got wet. Then I went to the tospital. A doctor said: " You were fever! " He gived me some medicine.

Corrected essay:
Last weekend, I went to a picnic in the park with my friends. That afternoon, it suddenly began to rain. I forgot to bring an umbrella. I got wet. Then I went to the hospital. A doctor said, "You had a fever!" He gave me some medicine.

Error analysis:
error_sentence: Last weekend.
correct_sentence: Last weekend, I went to a picnic in the park with my friends.
error: .
correction: ,
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: According to English writing conventions, when the time adverbial 〈Last weekend〉 is used as a sentence-initial adverbial component, it needs to be separated from the main clause by a comma to clarify the sentence structure. Therefore, the period 〈.〉 at the end of the original sentence is changed to a comma 『,』, forming a grammatically correct complex sentence structure 『Last weekend, ...』, ensuring the correct connection between the adverbial and the main clause.

error_sentence: I went to picnic in the park with my friends.
correct_sentence: Last weekend, I went to a picnic in the park with my friends.
correction: a
error_type: Determiner Error
error_severity: 2
error_description: Determiner Error: According to English grammar rules, the countable noun 〈picnic〉 in its singular form must be accompanied by the indefinite article 〈a〉 to form a complete noun phrase when used generically. Therefore, the indefinite article 『a』 is added to the incomplete structure 〈went to picnic〉, correcting it to the grammatically compliant 『went to a picnic』, ensuring the correctness of the noun phrase structure and the completeness of the sentence meaning.

error_sentence: That afternoon. Suddenly begin rain.
correct_sentence: That afternoon, it suddenly began to rain.
error: . Suddenly begin
correction: , it suddenly began to
error_type: Verb Tense Error
error_severity: 5
error_description: ① Punctuation Error: According to English complex sentence structure rules, 〈That afternoon〉 and 〈Suddenly begin rain〉 have logical coherence and should be connected by a comma instead of separated by a period, thus the period 〈.〉 is changed to a comma 『,』; ② Pronoun Error: In English, describing natural phenomena requires the dummy subject 〈it〉, so the subject 『it』 is added to the subjectless clause 〈Suddenly begin rain〉, forming the complete structure 『it began to rain』; ③ Verb Tense Error: The time adverbial 〈That afternoon〉 clearly indicates the past, so the verb 〈begin〉 must follow the past tense rule, thus the base form verb 〈begin〉 is changed to the past tense 『began』; ④ Nonfinite Verb Form Error: According to English grammar rules, "begin to do" is a fixed phrase, so it should be modified to 『began to rain』.

error_sentence: I forgeted bring an umbrella.
correct_sentence: I forgot to bring an umbrella.
error: forgeted
correction: forgot to
error_type: Nonfinite Verb Form Error
error_severity: 3
error_description: ① Spelling Error: According to English irregular verb conjugation rules, the past tense of the verb 〈forget〉 is not formed by adding 〈-ed〉; its correct past tense form is 『forgot』. Therefore, the incorrect form 〈forgeted〉 is corrected to 『forgot』; ② Nonfinite Verb Form Error: According to the rules for using nonfinite verbs, when 〈bring〉 functions as an adverbial of purpose, it needs to be paired with the infinitive marker 『to』. Thus, it is corrected to 『to bring』 to comply with grammatical standards. Final correction: 『...forgot to bring...』.

error_sentence: I was got wet.
correct_sentence: I got wet.
error: was
error_type: Word Redundancy Error
error_severity: 3
error_description: Word Redundancy Error: Passive voice misuse: According to English verb usage rules, the phrase 〈get wet〉 itself already implies a passive meaning (indicating a change of state to "become wet"). Adding the auxiliary verb 〈was〉 creates a non-standard double passive structure (was got wet). Therefore, the redundant 〈was〉 is deleted to make the sentence grammatically correct.

error_sentence: Then I went to the tospital.
correct_sentence: Then I went to the hospital.
error: tospital
correction: hospital
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to English spelling rules, 〈tospital〉 is an incorrect spelling. The misspelled 〈tospital〉 is corrected to the proper form 『hospital』 “医院”, ensuring compliance with standard English spelling and accuracy in the medical context.

error_sentence: A doctor said: " You were fever! "
correct_sentence: A doctor said, "You had a fever!"
error: :
correction: ,
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: According to English rules for direct quotation, when using reporting verbs like 〈said〉, a comma, not a colon, should follow to introduce the direct speech. Therefore, 〈:〉 is changed to 『,』 to comply with English punctuation standards.

error_sentence: A doctor said: " You were fever! "
correct_sentence: A doctor said, "You had a fever!"
error: were
correction: had a
error_type: Verb Choice Error
error_severity: 5
error_description: ① Verb Choice Error: According to English fixed expressions, expressing "having (an illness)" requires the verb 〈have〉, not 〈be〉. Therefore, the past tense 〈were〉 is changed to 『had』 to meet semantic requirements; ② Determiner Error: According to noun rules, 〈fever〉 is a singular countable noun and requires the indefinite article 『a』 to form the complete phrase 『had a fever』.

error_sentence: He gived me some medicine.
correct_sentence: He gave me some medicine.
error: gived
correction: gave
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to English verb conjugation rules, 〈give〉 is an irregular verb. Its past tense form should be 〈gave〉, not the incorrect form 〈gived〉 derived from regular verb patterns. Therefore, 〈gived〉 is changed to 『gave』 to follow the irregular verb conjugation pattern.