Writing prompt: Lucy's grandmother is telling her about life several years ago. The environment where she lived has changed significantly. Using the provided hints and sentence patterns, write a short English essay about these changes.
Writing hints: different; flats; fields; bushes; buildings.
Reference sentence patterns: There was/were... ; There wasn't/weren't any... ; There was/were no...

Student essay:
Lucy's grandmother took Lucy to her life is change. Last some years ago, her grandmother's life is different. There weren't many buildings. There were many fields and bushes. But now, there are many flats

Corrected essay:
Lucy's grandmother told Lucy about how her life has changed. Some years ago, her grandmother's life was different. There weren't many buildings. There were many fields and bushes. But now, there are many flats.

Error analysis:
error_sentence: Lucy's grandmother took Lucy to her life is change.
correct_sentence: Lucy's grandmother told Lucy about how her life has changed.
error: took Lucy to
correction: told Lucy about how
error_type: Conjunction Error
error_severity: 4
error_description: ① Verb Choice Error: The verb 〈took〉 implies physical movement, but the context requires the meaning of 'telling'; 〈took〉 should be changed to 『told』 to fit the context; ② Preposition Error: According to the fixed English phrase 'tell somebody about something,' the preposition 〈to〉 should be changed to 『about』 to conform to the fixed phrase; ③ Conjunction Error: Based on the context, the 'something' in 'tell somebody about something' is an object clause. According to the meaning, the conjunction 『how』 needs to be added after the preposition 〈about〉 to introduce the object clause, expressing 'how it has changed' to fit the original meaning and grammatical rules.
error_sentence: Lucy's grandmother took Lucy to her life is change. Last some years ago, her grandmother's life is different.
correct_sentence: Lucy's grandmother told Lucy about how her life has changed. Some years ago, her grandmother's life was different.
error: is change. Last some
correction: has changed. Some
error_type: Word Redundancy Error
error_severity: 4
error_description: ① Verb Tense Error: According to the original meaning, the simple present tense 〈is〉 cannot express the completed state of 'has changed'; 〈is change〉 should be changed to the present perfect tense 『has changed』 to fit the original meaning; ② Word Redundancy Error: According to English expression habits, the time adverbial 'many years ago' can be directly expressed as 'Some years ago'; therefore, 〈Last some〉 is redundant here and needs to be simplified to 『Some』 to conform to English expression habits.
error_sentence: Last some years ago, her grandmother's life is different.
correct_sentence: Some years ago, her grandmother's life was different.
error: is
correction: was
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: According to the context, the time adverbial 〈Some years ago〉 clearly indicates the past tense, requiring the predicate verb to be in the simple past tense. Therefore, there is a verb tense error here. The simple present tense 〈is〉 needs to be changed to the simple past tense 『was』 to maintain tense consistency with the context.
error_sentence: But now, there are many flats
correct_sentence: But now, there are many flats.
correction: .
error_type: Punctuation Error
error_severity: 1
error_description: Punctuation Error: According to English syntax rules, the end of this independent clause is missing a period, resulting in a punctuation error. A period 『.』 needs to be added after the last word 〈flats〉 to mark the end of the sentence in accordance with English syntax rules.