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 have a picnic with my friends in the park in the afternoon it is began to rain I forget take umbrella I get wet I think very cold and headache my friends take me to hospital thee doctor said me have a fever he gave me medicine and told me have a good rest at home

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

Error analysis:
error_sentence: Last Sunday I have a picnic with my friends in the park in the afternoon it is began to rain I forget take umbrella I get wet
correct_sentence: Last Sunday I had a picnic with my friends in the park.
error: have
correction: had
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: According to the prompt and the original sentence, the time adverbial 〈Last Sunday〉 indicates the action occurred in the past, so the verb 〈have〉 needs to be changed to the past tense 『had』 to maintain tense consistency.

error_sentence: Last Sunday I have a picnic with my friends in the park in the afternoon it is began to rain I forget take umbrella I get wet
correct_sentence: Last Sunday I had a picnic with my friends in the park. In the afternoon, it began to rain.
error: in
correction: . In
error_type: Punctuation Error
error_severity: 2
error_description: ① Punctuation Error: In English grammar, 〈Last Sunday I have a picnic with my friends in the park〉 and 〈in the afternoon it is began to rain〉 are independent clauses. Lacking a period between them causes a run-on sentence error, so a 『.』 needs to be added after 〈park〉; ② Case Error: According to English writing conventions, the first letter of the word at the beginning of a sentence needs to be capitalized, so 〈in〉 needs to be changed to 『In』 to comply with the convention.

error_sentence: Last Sunday I have a picnic with my friends in the park in the afternoon it is began to rain I forget take umbrella I get wet
correct_sentence: In the afternoon, it began to rain.
error: it is
correction: , it
error_type: Word Redundancy Error
error_severity: 4
error_description: ① Punctuation Error: According to English grammar rules, a comma is needed after the time adverbial 〈In the afternoon〉 to separate it from the main clause, so it should be changed to 『, it began to rain』; ② Word Redundancy Error: Based on the original sentence's meaning, the intention here is to express 'it started raining in the afternoon'. The English word 'begin' itself can function as the predicate verb, not requiring the extra auxiliary verb 〈is〉. Therefore, 〈is〉 needs to be deleted, keeping only 『began』, which satisfies the predicate verb usage and also fits the simple past tense expression.

error_sentence: Last Sunday I have a picnic with my friends in the park in the afternoon it is began to rain I forget take umbrella I get wet I think very cold and headache my friends take me to hospital thee doctor said me have a fever he gave me medicine and told me have a good rest at home
correct_sentence: In the afternoon, it began to rain. I forgot to take an umbrella, so I got wet. I felt very cold and had a headache.
error: I forget take umbrella I get wet I think
correction: . I forgot to take an umbrella, so I got wet. I felt
error_type: Conjunction Error
error_severity: 5
error_description: ① Punctuation Error: Lacking a period between multiple actions causes a run-on sentence, so a 『.』 needs to be added before 〈I〉 to separate the previous sentence from this one; ② Verb Tense Error: From the original text's tense, it should be simple past tense here, so 〈forget〉 should be changed to the past tense 『forgot』; ③ Nonfinite Verb Form Error: According to English grammatical structure, the infinitive marker 『to』 needs to be added between 〈forget take〉 to form a correct grammatical structure; ④ Determiner Error: According to noun and article usage rules, 『an』 needs to be added before 〈umbrella〉; ⑤ Conjunction Error: The sentence 〈I forget take umbrella I get wet〉 lacks necessary punctuation and conjunctions, making the meaning unclear, so it needs to be separated by a comma and a conjunction added, corrected to 『, so I got wet』; ⑥ Verb Tense Error: From the original text's tense, it should be simple past tense here, so 〈get〉 should be changed to the past tense 『got』; ⑦ Punctuation Error: Based on the meaning, 〈I get wet I think〉 are two sentences, so a 『.』 is needed between them, changed to 『 I got wet. I felt』; ⑧ Verb Choice Error: 〈think〉 needs to be changed to 'feel' to express sensation, and since the original text's tense is simple past, the past tense 『felt』 should be used.

error_sentence: I think very cold and headache my friends take me to hospital thee doctor said me have a fever he gave me medicine and told me have a good rest at home
correct_sentence: I felt very cold and had a headache. My friends took me to the hospital.
error: headache my friends take
correction: had a headache. My friends took
error_type: Sentence Structure Error
error_severity: 5
error_description: ① Sentence Structure Error: In the sentence 〈I think very cold and headache〉, 〈think〉 cannot be paired with 〈headache〉, and a predicate verb is missing. The intended meaning is 'had a headache', so the predicate verb 'have' should be used. Since the tense is past, the predicate verb 『had』 is added to supply the missing verb; ② Determiner Error: Based on word class and phrase collocation, 〈headache〉 is a noun and requires the article 『a』 before it to express 'a headache'; ③ Punctuation Error: From the grammatical structure and original sentence meaning, the sentence 〈headache my friends take〉 lacks necessary punctuation separation, so a period is needed to separate it; ④ Case Error: In English, the first letter of the word at the beginning of a sentence needs to be capitalized, so 〈my〉 should be changed to 『My』; ⑤ Verb Tense Error: From the original text's tense, it should be simple past tense here, so 〈take〉 should be changed to the past tense 『took』.

error_sentence: I think very cold and headache my friends take me to hospital thee doctor said me have a fever he gave me medicine and told me have a good rest at home
correct_sentence: My friends took me to the hospital. The doctor said I had a fever.
error: hospital thee
correction: the hospital. The
error_type: Determiner Error
error_severity: 4
error_description: ① Punctuation Error: According to English grammar principles, the phrase 〈hospital thee〉 needs a period after 〈hospital〉 to form an independent sentence, so 『.』 is added; ② Spelling Error: Based on the original text's meaning, the definite article 『the』 should be used here for specification. Thus, 〈thee〉 is a spelling error and needs to be changed to 『the』 to comply with correct spelling rules; ③ Determiner Error: Based on noun class and article usage, the definite article is missing before 〈hospital〉, so it should be changed to 『the hospital』; ④ Case Error: According to English writing conventions, the first letter of the word at the beginning of a sentence needs to be capitalized, so 〈the〉 needs to be changed to 『The』 to comply with the convention.

error_sentence: I think very cold and headache my friends take me to hospital thee doctor said me have a fever he gave me medicine and told me have a good rest at home
correct_sentence: The doctor said I had a fever.
error: me have
correction: I had
error_type: Verb Tense Error
error_severity: 4
error_description: ① Pronoun Error: In English grammatical structure, the subject personal pronoun in indirect speech should use the subjective case, not the objective case. Therefore, the objective case 〈me〉 should be changed to 『I』 to comply with correct grammatical norms; ② Verb Tense Error: The overall tense of the original text is simple past, and this is indirect speech. When using indirect speech, if the main clause is in the simple past, the tense of the reported speech should also be backshifted. The doctor's original words were likely in the simple present tense, which backshifts to the simple past tense. Therefore, 〈have〉 should be changed to the simple past tense 『had』.

error_sentence: I think very cold and headache my friends take me to hospital thee doctor said me have a fever he gave me medicine and told me have a good rest at home
correct_sentence: The doctor said I had a fever. He gave me medicine and told me to have a good rest at home.
error: he
correction: . He
error_type: Punctuation Error
error_severity: 3
error_description: ① Punctuation Error: According to the context, a period is needed before the sentence 〈he gave me medicine〉 to separate it from the preceding sentence 〈doctor said I had a fever〉, ensuring it is an independent sentence. Therefore, 『.』 is added before 〈he〉; ② Case Error: According to English writing conventions, the first letter of the word at the beginning of a sentence needs to be capitalized. The 〈he〉 at the beginning of the sentence needs to be changed to uppercase 『He』 to comply with English writing conventions.

error_sentence: I think very cold and headache my friends take me to hospital thee doctor said me have a fever he gave me medicine and told me have a good rest at home
correct_sentence: He gave me medicine and told me to have a good rest at home.
correction: to
error_type: Nonfinite Verb Form Error
error_severity: 3
error_description: Nonfinite Verb Form Error: In English morphological structure, the verb 〈have〉 follows 〈told〉 and needs to use the infinitive form of the nonfinite verb, 『to have』, to comply with verb collocation rules. Therefore, the correct form is 『told me to have』.

error_sentence: I think very cold and headache my friends take me to hospital thee doctor said me have a fever he gave me medicine and told me have a good rest at home
correct_sentence: He gave me medicine and told me to have a good rest at home.
correction: .
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: To comply with English writing conventions, when a period is missing at the end of a sentence, a 『.』 needs to be added at the end of the sentence 〈he gave me medicine and told me have a good rest at home〉 to comply with English writing conventions.