Writing prompt: Written Expression.
Assume you are Li Dong. Please read the following email from your American pen pal, David. Then, write an email reply answering his questions.
Dear Li Dong,
I heard you'll have a yard sale to sell one of your favourite books this weekend. I'm interested in buying it. Do you mind answering my following questions?
1. What's the book about?
2. How did you get it?
3. What do you think of it?
4. How long have you had it?
5. Why do you plan to sell it?
I'm looking forward to your reply.
Yours,
David
Requirements: Write around 80 words, excluding the given email format. You may add relevant details.
Writing hints: a storybook; Mother bought it; have had three years; have read many times

Student essay:
It's a Alice's Adventures book. It's mother buy for me, and l like it vrey much, because it is a interesting book. I read it for two months. I want to because i have got not much pocket money.

Corrected essay:
It's Alice's Adventures. My mother bought it for me, and I like it very much, because it is an interesting book. I read it for two months. I want to sell it because I don't have much pocket money.

Error analysis:
error_sentence: It's a Alice's Adventures book.
correct_sentence: It's Alice's Adventures.
error: a
error_type: Determiner Error
error_severity: 3
error_description: Determiner Error: According to English grammar rules, the proper noun book title 〈Alice's Adventures〉 does not require the article 〈a〉 for modification; therefore, 〈a〉 is deleted to comply with grammatical rules.
error_sentence: It's a Alice's Adventures book. It's mother buy for me, and l like it vrey much, because it is a interesting book.
correct_sentence: It's Alice's Adventures. My mother bought it for me, and I like it very much, because it is an interesting book.
error: book. It's mother buy
correction: . My mother bought it
error_type: Word Redundancy Error
error_severity: 5
error_description: ① Word Redundancy Error: 'Alice's Adventures' is the name of a book itself; in the sentence 'It's a Alice's Adventures book', 'book' is a redundant noun and needs to be deleted; ② Sentence Structure Error: According to the context, the author intends to express 'My mother bought this book'; 'It's mother buy' is an incorrect expression; considering the tense, a subject-verb-object structure should be used, i.e., 'My mother bought it'.
error_sentence: It's mother buy for me, and l like it vrey much, because it is a interesting book.
correct_sentence: My mother bought it for me, and I like it very much, because it is an interesting book.
error: l
correction: I
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to English writing conventions, the pronoun 〈I〉 is incorrectly written as the lowercase letter 'l'; therefore, the lowercase 〈l〉 is corrected to 『I』 to represent 'I'.
error_sentence: It's mother buy for me, and l like it vrey much, because it is a interesting book.
correct_sentence: My mother bought it for me, and I like it very much, because it is an interesting book.
error: vrey
correction: very
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to English writing conventions, the adverb 〈very〉 is misspelled as 〈vrey〉; it needs to be corrected to 『very』 to comply with correct spelling rules, meaning 'very'.
error_sentence: It's mother buy for me, and l like it vrey much, because it is a interesting book.
correct_sentence: My mother bought it for me, and I like it very much, because it is an interesting book.
error: a
correction: an
error_type: Determiner Error
error_severity: 3
error_description: Determiner Error: According to English writing conventions, the adjective 〈interesting〉 begins with a vowel sound, requiring the article 『an』 instead of 『a』 before it; therefore, it is corrected to 『an interesting book』.
error_sentence: I want to because i have got not much pocket money.
correct_sentence: I want to sell it because I don't have much pocket money.
error: because i have got not
correction: sell it because I don't have
error_type: Sentence Structure Error
error_severity: 4
error_description: ① Sentence Structure Error: In English, 'want to do sth.' means wanting to do something. The original sentence 〈I want to because〉 lacks the 'do' verb; 『sell it』 needs to be added according to the context to complete the sentence, meaning 'want to sell it'; ② Auxiliary Error: According to English writing conventions, the form 〈have got not〉 is incorrect; it should be changed to 『don't have』 to comply with the grammatical rules for negation, meaning 'do not have'.