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 Saturday, my friends and I was had a picnic. It was rain in the afternoon. I get wet so I feel cold and have a headache. I go to the hospital. The doctor tell me I had a fever. So the doctor give me some medicine .

Corrected essay:
Last Saturday, my friends and I had a picnic. It was raining in the afternoon. I got wet so I felt cold and had a headache. I went to the hospital. The doctor told me I had a fever. So the doctor gave me some medicine.

Error analysis:
error_sentence: Last Saturday, my friends and I was had a picnic.
correct_sentence: Last Saturday, my friends and I had a picnic.
error: was
error_type: Sentence Structure Error
error_severity: 3
error_description: Sentence Structure Error: The original sentence intends to express 'My friends and I had a picnic', describing a past event, so the simple past tense should be used. The word 〈had〉 already expresses the tense, making 〈was〉 unnecessary. This is a sentence structure error due to blending sentence patterns, so 〈was〉 needs to be deleted to follow English grammar rules.

error_sentence: It was rain in the afternoon.
correct_sentence: It was raining in the afternoon.
error: rain
correction: raining
error_type: Nonfinite Verb Form Error
error_severity: 3
error_description: ① Nonfinite Verb Form Error: According to the past continuous tense rule, it requires the structure 'was/were + present participle' to indicate an action continuing at a specific point in the past. In the original sentence 〈It was rain in the afternoon.〉, 〈rain〉 is not in the present participle form, which is a nonfinite verb form error. 〈rain〉 needs to be changed to 『raining』 so that 『was raining』 forms the past continuous tense, conforming to grammar rules and expressing the meaning of 'it was raining continuously in the afternoon'.

error_sentence: I get wet
correct_sentence: I got wet
error: get
correction: got
error_type: Verb Tense Error
error_severity: 3
error_description: ① Verb Tense Error: According to English tense rules, verbs describing past events should be in the past tense. In the original sentence 〈I get wet so I feel cold and have a headache.〉, 〈get〉 is a verb tense error because it describes something that happened in the past (last Saturday). Therefore, 〈get〉 needs to be changed to 『got』 to maintain tense consistency throughout the text and meet the tense requirement for narrating past events.

error_sentence: so I feel cold and have a headache.
correct_sentence: so I felt cold and had a headache.
error: feel
correction: felt
error_type: Verb Tense Error
error_severity: 3
error_description: ① Verb Tense Error: According to English tense rules, verbs describing past events should be in the past tense. In the original sentence 〈so I feel cold and have a headache.〉, 〈feel〉 is a verb tense error because it describes something that happened in the past (last Saturday). 〈feel〉 needs to be changed to 『felt』 to match the tense requirement for narrating past events and maintain contextual tense consistency.

error_sentence: so I feel cold and have a headache.
correct_sentence: so I felt cold and had a headache.
error: have
correction: had
error_type: Verb Tense Error
error_severity: 3
error_description: ① Verb Tense Error: According to English tense rules, verbs describing past events should be in the past tense. In the original sentence 〈so I feel cold and have a headache.〉, 〈have〉 is a verb tense error as the sentence describes something that happened in the past (last Saturday). 〈have〉 needs to be changed to 『had』 to meet the tense requirement for narrating past events and maintain contextual tense consistency.

error_sentence: I go to the hospital.
correct_sentence: I went to the hospital.
error: go
correction: went
error_type: Verb Tense Error
error_severity: 3
error_description: ① Verb Tense Error: According to English tense rules, actions completed in the past require the past tense. In the original sentence 〈I go to the hospital.〉, 〈go〉 is a verb tense error because the sentence describes a past event (going to the hospital last Saturday). Therefore, 〈go〉 needs to be changed to 『went』 to meet the tense requirement for narrating past events and correctly express the past hospital visit.

error_sentence: The doctor tell me I had a fever.
correct_sentence: The doctor told me I had a fever.
error: tell
correction: told
error_type: Verb Tense Error
error_severity: 3
error_description: ① Verb Tense Error: According to English tense rules, verbs describing past events need to be in the past tense. In the original sentence 〈The doctor tell me I had a fever.〉, 〈tell〉 is a verb tense error because the doctor's action of informing occurred in the past. Therefore, 〈tell〉 needs to be changed to 『told』 to meet the tense requirement for narrating past events and correctly express the past action.

error_sentence: So the doctor give me some medicine .
correct_sentence: So the doctor gave me some medicine.
error: give
correction: gave
error_type: Verb Tense Error
error_severity: 3
error_description: ① Verb Tense Error: According to English tense rules, verbs describing past events should be in the past tense. In the original sentence 〈So the doctor give me some medicine.〉, 〈give〉 is a verb tense error because the doctor's action of giving medicine occurred in the past. Therefore, 〈give〉 needs to be changed to 『gave』 to meet the tense requirement for narrating past events and correctly express the past action.