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:
I 'm Lin Chen. This Summer I will going to Bei Jing with my family. First, we will going to Tian'anmen Square. We can see the flag. Second, we will going to the Palace Museum. We can see many many beautiful building. Last we will going to eat some Beijing Roast Duck.

Corrected essay:
I'm Lin Chen. This summer I will go to Beijing with my family. First, we will go to Tian'anmen Square. We can see the flag. Second, we will go to the Palace Museum. We can see many beautiful buildings. Lastly, we will go to eat some Beijing Roast Duck.

Error analysis:
error_sentence: I 'm Lin Chen.
correct_sentence: I'm Lin Chen.
error: 'm
correction: 'm
error_type: Space Error
error_severity: 1
error_description: Space Error: According to English contraction rules, the verb 〈'm〉, as the contraction of 〈I am〉, must be written immediately after the subject pronoun 〈I〉 without a space. The original sentence 〈I 'm〉 violates this rule, so it is corrected to 『I'm』 to conform to standard writing format.
error_sentence: This Summer I will going to Bei Jing with my family.
correct_sentence: This summer I will go to Beijing with my family.
error: Summer
correction: summer
error_type: Case Error
error_severity: 1
error_description: Case Error: According to English proper noun rules, season names are common nouns and should not be capitalized unless they are at the beginning of a sentence or in a specific title. The original sentence incorrectly capitalizes 〈Summer〉; it should be changed to 『summer』 to comply with the standard writing convention for season words.
error_sentence: This Summer I will going to Bei Jing with my family.
correct_sentence: This summer I will go to Beijing with my family.
error: going to Bei Jing
correction: go to Beijing
error_type: Nonfinite Verb Form Error
error_severity: 4
error_description: ① Nonfinite Verb Form Error: According to the grammatical rule for the English modal verb 〈will〉, it must be followed by the base form of the verb to form the predicate. The original phrase 〈will going〉 incorrectly uses the present participle 〈going〉, so it is corrected to 『will go』 to fit the basic structure; ② Spelling Error: According to the English transliteration standards for Chinese proper nouns, the Chinese city name 〈Bei Jing〉 should be written as one capitalized word. The original sentence incorrectly separates it into two words; it should be corrected to 『Beijing』 to comply with internationally accepted place name spelling standards.
error_sentence: First, we will going to Tian'anmen Square.
correct_sentence: First, we will go to Tian'anmen Square.
error: going
correction: go
error_type: Nonfinite Verb Form Error
error_severity: 3
error_description: Nonfinite Verb Form Error: According to the grammatical rule for the English modal verb 〈will〉, it must be followed by the base form of the verb to form the predicate. The original phrase 〈will going〉 incorrectly uses the present participle 〈going〉, so it is corrected to 『will go』 to fit the basic structure.
error_sentence: Second, we will going to the Palace Museum.
correct_sentence: Second, we will go to the Palace Museum.
error: going
correction: go
error_type: Nonfinite Verb Form Error
error_severity: 3
error_description: Nonfinite Verb Form Error: According to the grammatical rule for the English modal verb 〈will〉, it must be followed by the base form of the verb to form the predicate. The original phrase 〈will going〉 incorrectly uses the present participle 〈going〉, so it is corrected to 『will go』 to fit the basic structure.
error_sentence: We can see many many beautiful building.
correct_sentence: We can see many beautiful buildings.
error: many
error_type: Word Redundancy Error
error_severity: 3
error_description: Word Redundancy Error: According to the principle of conciseness in English expression, the repetition of the adjective 〈many〉 in 〈many many beautiful building〉 is redundant. The second 〈many〉 should be deleted, and the singular countable noun 〈building〉 should be changed to its plural form to match the determiner, finally corrected to 『many beautiful buildings』 to make the sentence more concise and fluent.
error_sentence: We can see many many beautiful building. Last we will going to eat some Beijing Roast Duck.
correct_sentence: We can see many beautiful buildings. Lastly, we will go to eat some Beijing Roast Duck.
error: building. Last
correction: buildings. Lastly,
error_type: PoS Confusion Error
error_severity: 4
error_description: ① Noun Number Error: According to English grammar rules, when the determiner 〈many〉, indicating quantity, modifies the countable noun 〈building〉, the noun must be in its plural form. Therefore, the singular noun 〈building〉 is corrected to the plural noun 『buildings』 to maintain number agreement; ② PoS Confusion Error: Based on syntactic analysis, using the adjective 〈Last〉 as a transition word in the original sentence does not conform to standard English expression. It should be changed to the adverb form 『Lastly,』 meaning "finally," to correctly introduce the concluding content.
error_sentence: Last we will going to eat some Beijing Roast Duck.
correct_sentence: Lastly, we will go to eat some Beijing Roast Duck.
error: going
correction: go
error_type: Nonfinite Verb Form Error
error_severity: 3
error_description: Nonfinite Verb Form Error: According to the grammatical rule for the English modal verb 〈will〉, it must be followed by the base form of the verb to form the predicate. The original phrase 〈will going〉 incorrectly uses the present participle 〈going〉, so it is corrected to 『will go』 to fit the basic structure.