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:
Life is a few years ago was nothing like it is now. In the past , there were not so many apartments, but field are very beautiful this. And there used to be a lot of shrubs, and now the buildings have replaced the bushes.

Corrected essay:
Life a few years ago was nothing like it is now. In the past, there were not so many apartments, but the fields were very beautiful in this place. And there used to be a lot of shrubs, and now the buildings have replaced the bushes.

Error analysis:
error_sentence: Life is a few years ago was nothing like it is now.
correct_sentence: Life a few years ago was nothing like it is now.
error: is
error_type: Word Redundancy Error
error_severity: 4
error_description: Word Redundancy Error: According to English grammar rules, the 'be verb' when used alone means 'is/exists'; the original sentence 〈Life is a few years ago was〉 has a redundant copula; 〈is〉 is a redundant element here; the adverbial phrase 〈a few years ago〉 acts as a post-modifier for the subject 〈Life〉; therefore, 〈is〉 should be deleted, changing it to 『Life a few years ago was』 to conform to English grammar and make the sentence more concise.

error_sentence: In the past , there were not so many apartments, but field are very beautiful this.
correct_sentence: In the past, there were not so many apartments, but the fields were very beautiful in this place.
error: field are
correction: the fields were
error_type: Verb Tense Error
error_severity: 5
error_description: ① Determiner Error: According to English grammar rules, the definite article 『the』 indicates specificity; the noun 〈field〉 mentioned in the original sentence lacks the necessary definite article 『the』 to specify the object; therefore, 『the』 needs to be added before 〈field〉 to clarify the meaning; ② Subject-Verb Agreement Error: According to English grammar rules, 〈field〉 in the original sentence should be in the plural form 『fields』 to agree with the verb 〈are〉; therefore, 〈field〉 should be changed to 『fields』 to conform to English grammar rules; ③ Verb Tense Error: According to the prompt requirements, 'a few years ago' describes past events and should use the simple past tense; however, 〈are〉 in the original sentence is in the simple present tense; therefore, 〈are〉 needs to be changed to the simple past tense 『were』 to fit the context.

error_sentence: In the past , there were not so many apartments, but field are very beautiful this.
correct_sentence: In the past, there were not so many apartments, but the fields were very beautiful in this place.
error: this
correction: in this place
error_type: Noun Error
error_severity: 4
error_description: ① Preposition Error: According to English grammar rules, the demonstrative pronoun 〈this〉 alone cannot function as an adverbial of place; therefore, the preposition 『in』 needs to be added to form the complete prepositional phrase 『in this place』 to conform to English grammar rules; ② Noun Error: According to the prompt requirements, the original sentence is missing 'place'; therefore, the noun 『place』 needs to be added to clearly indicate the location.