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 are has a pincnic. Afternoon has little rain. I forgot take my umbrella. I get wet. I feel very cold and has a headache. My friends take me go to the hospital. Doctor say: "I am fever. "Doctor give me some medicine and go home let me have a good rest.

Corrected essay:
Last Sunday, my friends and I had a picnic. In the afternoon, it rained a little. I had forgotten to take my umbrella, so I got wet. I felt very cold and had a headache. My friends took me to the hospital. The doctor said, "You have a fever." The doctor gave me some medicine and let me go home and have a good rest.

Error analysis:
error_sentence: Last Sunday. My friends and I are has a pincnic.
correct_sentence: Last Sunday, my friends and I had a picnic.
error: . My
correction: , my
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: According to English syntax rules, when a time adverbial is at the beginning of a complete compound sentence, it should be separated from the main clause by a comma, not a period. Therefore, there is a punctuation error here. 〈. My〉 needs to be changed to 『, my』 to comply with English syntax rules.

error_sentence: My friends and I are has a pincnic. Afternoon has little rain.
correct_sentence: Last Sunday, my friends and I had a picnic. In the afternoon, it rained a little.
error: are has a pincnic. Afternoon has little rain
correction: had a picnic. In the afternoon, it rained a little
error_type: Word Redundancy Error
error_severity: 4
error_description: ① Word Redundancy Error: According to English grammar rules, a 'be' verb and a main verb cannot both serve as the predicate verb of a sentence. Therefore, the redundant 'be' verb 〈are〉 needs to be deleted; ② Verb Tense Error: According to the context, past events require the past tense of the verb; 〈has〉 needs to be changed to the past tense 『had』 to match the contextual tense; ③ Spelling Error: According to English word spelling conventions, the correct spelling of the English word “野餐” (picnic) is “picnic”; therefore, the misspelled 〈 pincnic〉 needs to be changed to 『picnic』 to comply with English word spelling conventions; ④ Sentence Structure Error: According to the original sentence's meaning, a time expression is needed at the beginning of the sentence as a time adverbial. “afternoon” needs to be combined with a preposition and a definite article to form a complete time phrase as a time adverbial. Therefore, 〈Afternoon〉 needs to be changed to 『In the afternoon,』 at the beginning of the sentence as a time adverbial to comply with English grammar and syntax rules; according to the original sentence's meaning, it intends to express “it rained a little in the afternoon,” the time word “afternoon” in the original sentence cannot be the subject. The modified sentence still lacks a subject; it is necessary to add the formal subject 『it』, changing the original 〈has little rain〉 to 『it rained a little』 to form a “subject + predicate verb + complement” sentence structure to comply with the original meaning and English syntax rules.

error_sentence: I forgot take my umbrella.
correct_sentence: I had forgotten to take my umbrella, so I got wet.
error: forgot
correction: had forgotten to
error_type: Verb Tense Error
error_severity: 4
error_description: ① Verb Tense Error: According to the original sentence's meaning, the predicate verb “forgot” occurred before “went to the park last Sunday,” which is “past of the past,” requiring the past perfect tense of the verb. Therefore, there is a verb tense error here. The past tense verb 〈forgot〉 needs to be changed to the past perfect tense 『had forgotten』 to correctly express the time sequence; ② Preposition Error: According to English fixed collocations, the verb phrase “forget to do something” means “to forget to do something.” Therefore, the preposition 『to』 needs to be added after 〈had forgotten〉 to express “forgot to take the umbrella” to comply with English fixed collocations.

error_sentence: I forgot take my umbrella. I get wet.
correct_sentence: I had forgotten to take my umbrella, so I got wet.
error: . I get
correction: , so I got
error_type: Conjunction Error
error_severity: 4
error_description: ① Conjunction Error: According to English syntax rules, the original clauses 〈I had forgotten to take my umbrella〉 and 〈I get wet〉 are two coordinate clauses in the same compound sentence, and the latter clause is the “result” of the former, requiring connection with a comma and a coordinating conjunction. Therefore, there is a conjunction error here. 〈. I get〉 needs to be changed to 『, so I got』 to comply with English syntax rules and make the meaning coherent; ② Verb Tense Error: According to the context, the original tense is simple past; there is a verb tense error here. In a past event, the base form of the predicate verb 〈get〉 should be changed to the simple past tense 『got』 to match the contextual tense.

error_sentence: I feel very cold and has a headache.
correct_sentence: I felt very cold and had a headache.
error: feel
correction: felt
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: According to the context, the original tense is simple past; there is a verb tense error here. In a past event, the base form of the predicate verb 〈feel〉 should be changed to the simple past tense 『felt』 to match the contextual tense.

error_sentence: I feel very cold and has a headache.
correct_sentence: I felt very cold and had a headache.
error: has
correction: had
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: According to the context, the original tense is simple past; there is a verb tense error here. In a past event, the third-person singular present tense form of the predicate verb 〈has〉 should be changed to the simple past tense 『had』 to match the contextual tense.

error_sentence: My friends take me go to the hospital.
correct_sentence: My friends took me to the hospital.
error: take me go
correction: took me
error_type: Word Redundancy Error
error_severity: 4
error_description: ① Verb Tense Error: According to the context, the original tense is simple past; there is a verb tense error here. In a past event, the base form of the predicate verb 〈take〉 should be changed to the simple past tense 『took』 to match the contextual tense; ② Word Redundancy Error: According to English fixed collocations, the verb phrase “take somebody to somewhere” means “to take/send someone to a place.” Therefore, the redundant 〈go〉 should be deleted here to correctly express “took me to the hospital” to comply with English fixed collocations.

error_sentence: Doctor say: "I am fever.
correct_sentence: The doctor said, "You have a fever."
error: Doctor say: "I am
correction: The doctor said, "You have a
error_type: Verb Choice Error
error_severity: 4
error_description: ① Determiner Error: According to English grammar rules, a singular noun for a profession like “doctor” used as a subject needs a determiner; therefore, the definite article 『The』 needs to be added at the beginning of the sentence. Following previous corrections, non-proper nouns not at the beginning of a sentence do not need to be capitalized. Therefore, 〈Doctor〉 needs to be changed to 『doctor』; ② Verb Tense Error: According to the context, the original tense is simple past; there is a verb tense error here. In a past event, the base form of the predicate verb 〈say〉 should be changed to the simple past tense 『said』 to match the contextual tense; ③ Punctuation Error: According to English writing conventions, a comma, not a colon, is needed to separate direct speech; therefore, 〈:〉 needs to be changed to 『,』 to comply with English writing conventions; ④ Pronoun Error: According to the original sentence's meaning, this is a direct quote from the doctor saying “You have a fever”; therefore, the subject of the sentence 〈I〉 needs to be changed to 『You』; ⑤ Verb Choice Error: According to the original sentence's meaning, this is a direct quote from the doctor saying “You have a fever.” The fixed collocation for “to have a fever” is “have a fever”; therefore, 〈am fever〉 needs to be changed to 『have a fever』 to comply with English fixed collocations and the original meaning.

error_sentence: "Doctor give me some medicine and go home let me have a good rest.
correct_sentence: The doctor gave me some medicine and let me go home and have a good rest.
error: Doctor give
correction: The doctor gave
error_type: Verb Tense Error
error_severity: 4
error_description: ① Determiner Error: According to English grammar rules, a singular noun for a profession like “doctor” used as a subject needs a determiner; therefore, the definite article 『The』 needs to be added at the beginning of the sentence. Following previous corrections, non-proper nouns not at the beginning of a sentence do not need to be capitalized. Therefore, 〈Doctor〉 needs to be changed to 『doctor』; ② Verb Tense Error: According to the context, the original tense is simple past; there is a verb tense error here. In a past event, the base form of the predicate verb 〈give〉 should be changed to the simple past tense 『gave』 to match the contextual tense.

error_sentence: "Doctor give me some medicine and go home let me have a good rest.
correct_sentence: The doctor gave me some medicine and let me go home and have a good rest.
error: go home let me
correction: let me go home and
error_type: Word Order Error
error_severity: 4
error_description: ① Word Order Error: According to the original sentence's meaning, it intends to express “let me go home.” The correct English expression for “let someone do something” is “let somebody do something.” Therefore, there is a word order error here. 〈go home let me〉 needs to be changed to 『let me go home』 to comply with the original meaning and English fixed collocations; ② Conjunction Error: According to English syntax rules, when there are two and only two coordinate verb phrases in a sentence, they need to be connected by a coordinating conjunction. Therefore, the coordinating conjunction 『and』 needs to be added between 〈go home〉 and 〈have a good rest〉 to comply with syntax rules.