Writing prompt: Written Expression. Assume you are Lin Chen and have just made a new pen pal named Ted. Please write a letter to him describing your personal background, family situation, and your plan to visit Beijing over the summer. Writing hints: Tian'anmen Square, the Palace Museum, Beijing Roast Duck.
Dear Ted,
________
Welcome to China. Have a good day!
Yours,
Lin Chen

Student essay:
Hello, dear Ted. I'm a girl. And I'm live in Xian. I have a brother. We are going to Beijing. I'm plan to Tian'anmen and the Place Museum. And I want to taste the Beijing Roats Duck.

Corrected essay:
Hello, Ted. I'm a girl. And I live in Xi'an. I have a brother. We are going to Beijing. I'm planning to go to Tian'anmen Square and the Palace Museum. And I want to taste the Beijing Roast Duck.

Error analysis:
error_sentence: Hello, dear Ted.
correct_sentence: Hello, Ted.
error: dear
error_type: Word Redundancy Error
error_severity: 3
error_description: Word Redundancy Error: In informal letters, salutations are usually concise and natural. The word 〈dear〉 is redundant after the greeting and is removed to make the sentence conform better to English letter format.
error_sentence: And I'm live in Xian.
correct_sentence: And I live in Xi'an.
error: 'm
error_type: Auxiliary Error
error_severity: 3
error_description: Auxiliary Error: According to the context, the simple present tense is needed to express the state of 'I currently live in Xi'an', not the present continuous tense. Therefore, there is an auxiliary error. The contraction 〈 I'm〉, indicating present continuous tense, needs to be changed to 『I』 to fit the context.
error_sentence: And I'm live in Xian.
correct_sentence: And I live in Xi'an.
error: Xian
correction: Xi'an
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to English writing conventions, the correct English spelling for the place name '西安' is 'Xi'an', requiring an apostrophe as a syllable-dividing mark in Hanyu Pinyin. Therefore, there is a spelling error. The incorrect spelling 〈Xian〉 needs to be changed to 『Xi'an』 to comply with English writing conventions.
error_sentence: I'm plan to Tian'anmen and the Place Museum.
correct_sentence: I'm planning to go to Tian'anmen Square and the Palace Museum.
error: plan
correction: planning to go
error_type: Sentence Structure Error
error_severity: 4
error_description: ① Nonfinite Verb Form Error: According to English grammar rules, the continuous tense requires the structure 〈be verb + V-ing〉, so the base form verb 〈plan〉 needs to be changed to 『planning』 to conform to English grammar rules; ② Sentence Structure Error: The English phrasal verb 'plan to do something' means to intend to do something. Here, 〈Tian'anmen〉 functions as 'something', so 『go to』 needs to be added before 〈Tian'anmen〉 to mean 'plan to go to Tian'anmen', making the sentence structure complete.
error_sentence: I'm plan to Tian'anmen and the Place Museum.
correct_sentence: I'm planning to go to Tian'anmen Square and the Palace Museum.
correction: Square
error_type: Noun Error
error_severity: 3
error_description: Noun Error: According to English spelling conventions, the correct expression for the proper noun '天安门广场' is 'Tian'anmen Square', with the first letter capitalized. Therefore, there is a noun error. 〈Tian'anmen〉 needs to be changed to 『Tian'anmen Square』 to accurately refer to Tian'anmen Square and comply with English spelling conventions.
error_sentence: I'm plan to Tian'anmen and the Place Museum.
correct_sentence: I'm planning to go to Tian'anmen Square and the Palace Museum.
error: Place
correction: Palace
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to English spelling conventions, the correct expression for the proper noun '故宫博物馆' is 'the Palace Museum'. Therefore, there is a spelling error. The incorrect word 〈Place〉 needs to be changed to 『Palace』 to accurately refer to the Palace Museum and comply with English spelling conventions.
error_sentence: And I want to taste the Beijing Roats Duck.
correct_sentence: And I want to taste the Beijing Roast Duck.
error: Roats
correction: Roast
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to English spelling conventions, the correct expression for the noun '北京烤鸭' is 'Beijing Roast Duck', with the first letters capitalized. Therefore, there is a spelling error. 〈Roats〉 needs to be changed to 『Roast』 to accurately refer to Beijing Roast Duck and comply with English spelling conventions.