Writing prompt: Writing.
Assume you are Wang Lin and need to write a letter to your friend Xiaoyun. Tell her you need to keep the dictionary you borrowed from her for a few more days to look things up. Promise that you will take good care of the dictionary and not damage it. Also, inform her that your foreign teacher, Helen, is returning to her home country next week. Teacher Helen left you some useful books, and you want to share them with Xiaoyun. Based on the information above, write a letter of about 80 words.
Writing hints: dictionary; look up; damage; helpful; share

Student essay:
Dear Xiaoyun, I should borrow your dictionary a lot of days. I will take good care of it, and I will not damage it. My forigne teacher will come back next week. She gave me some helpful books. I will share them with you. Best Wishes Wanglin

Corrected essay:
Dear Xiaoyun,
I need to borrow your dictionary for several days. I will take good care of it, and I will not damage it. My foreign teacher will go back to her country next week. She gave me some helpful books. I will share them with you.
Best wishes, Wang Lin

Error analysis:
error_sentence: Dear Xiaoyun, I should borrow your dictionary a lot of days.
correct_sentence: Dear Xiaoyun,
I need to borrow your dictionary for several days.
error: I should
correction: 
I need to
error_type: Format Error
error_severity: 3
error_description: ① Format Error: According to English letter writing conventions, the salutation 〈Dear Xiaoyun,〉 and the body text need a line break to conform to letter writing standards; therefore, a newline character 『\n』 should be added before 〈I〉 to meet the format requirements; ② Verb Choice Error: According to English grammar and semantic expression, the modal verb "should" is typically used to express obligation or advice. However, in the original sentence, the speaker intends to express the fact of "needing" to borrow the dictionary, not an obligation or advice; "need to" more accurately conveys this need. The use of "should" in the original sentence does not fit the context and is a verb choice error; 〈I should〉 should be changed to 『I need to』 to make the sentence's expression more semantically logical.

error_sentence: Dear Xiaoyun, I should borrow your dictionary a lot of days.
correct_sentence: Dear Xiaoyun,
I need to borrow your dictionary for several days.
error: a lot of
correction: for several
error_type: Word Redundancy Error
error_severity: 4
error_description: ① Preposition Error: According to English grammar rules, describing the duration of an action requires the use of "for" to connect; "a lot of" is typically used to modify plural countable nouns or uncountable nouns, indicating a large quantity, and cannot be used to connect a time period. The original sentence uses 〈a lot of days〉 to express the length of time, which is a preposition error; 〈a lot of days〉 should be changed to 『for several days』; ② Word Redundancy Error: 〈a lot of days〉 is not concise or precise enough when expressing time; "several" itself means "a few; some"; 『for several days』 is more concise and idiomatic than 〈a lot of days〉. Therefore, the original sentence's expression has a word redundancy issue; changing 〈a lot of days〉 to 『for several days』 makes the sentence expression more refined.

error_sentence: My forigne teacher will come back next week.
correct_sentence: My foreign teacher will go back to her country next week.
error: forigne
correction: foreign
error_type: Spelling Error
error_severity: 2
error_description: ① Spelling Error: According to English spelling rules, the correct spelling for "外国的" is "foreign". In the original sentence, the letter order in "forigne" is incorrect and does not conform to the correct spelling form, constituting a spelling error. Therefore, 〈forigne〉 needs to be changed to 『foreign』 to make the sentence conform to English standards and accurately express the meaning "My foreign teacher will return to her country next week".

error_sentence: My forigne teacher will come back next week.
correct_sentence: My foreign teacher will go back to her country next week.
error: come back
correction: go back to her country
error_type: Verb Choice Error
error_severity: 3
error_description: ① Verb Choice Error: In English, 〈come back〉 means returning to the speaker's location. According to the context of the original sentence, the foreign teacher is returning to her own country, not to the speaker's location; using 〈come back〉 does not fit the meaning and is a verb choice error. Therefore, 〈come back〉 should be changed to 『go back to』, meaning "to go and return to a place", which better fits the sentence context; ② Sentence Structure Error: According to the context, simply saying "go back" does not specify the destination; "to her country" needs to be added to clarify that the foreign teacher is returning to her own country. The original sentence omits the preposition and related content, resulting in an incomplete expression. Therefore, changing 〈come back〉 to 『go back to her country』 makes the sentence's meaning accurate and complete.

error_sentence: Best Wishes Wanglin
correct_sentence: I will share them with you.
 Best wishes, Wang Lin
error: Best Wishes Wanglin
correction: 
Best wishes, Wang Lin
error_type: Format Error
error_severity: 5
error_description: ① Format Error: According to English letter writing conventions, the closing needs to be written on a separate line to meet format requirements; the original sentence 〈Best Wishes Wanglin〉 is not on a new line, which is a format error; the closing and signature need to be on separate lines; ② Case Error: According to English writing conventions, "best wishes" is a fixed expression, and "wishes" does not need to be capitalized; in the original sentence 〈Best Wishes Wanglin〉, 〈Wishes〉 is capitalized incorrectly and should be changed to 『wishes』; ③ Punctuation Error: According to English letter format, a comma is needed after the closing to separate the signature; the original sentence 〈Best Wishes Wanglin〉 lacks a comma, which is a punctuation error; a 『,』 should be added after 『wishes』; ④ Space Error: According to English name spelling conventions, Chinese names should be written with the surname and given name separated; the original sentence 〈Wanglin〉 is not separated, which is a space error; it should be changed to 『Wang Lin』.