Writing prompt: Application

Student essay:
Dear Mr.Smith
I am a student in this school.I know you will have some lessens in this term,and Iwant to take part in the Today America.
I am very interested in this class.I can speak English fluently,so it isn't difficult for me to understand what you said.The reason why I whant to learn it is that I want to know some differences between America society and China society .And I like the freedom life and American's lifestyle.so I want to know some interesting things about it.
I hope you can consider me.I am looking forward to receiving you reply.

Corrected essay:
Dear Mr. Smith,
I am a student in this school. I know you will have some lessons in this term, and I want to take part in the Today America.
I am very interested in this class. I can speak English fluently, so it isn't difficult for me to understand what you say. The reason why I want to learn it is that I want to know some differences between American society and Chinese society. And I like the free life and American lifestyle, so I want to know some interesting things about it.
I hope you can consider me. I am looking forward to receiving your reply.

Error analysis:
error_sentence: Dear Mr.Smith
I am a student in this school.
correct_sentence: Dear Mr. Smith,
I am a student in this school.
correction: ,
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: According to English letter writing conventions, a comma must be used after the salutation 〈Mr.Smith〉 for separation, so 『,』 is added to change it to 『Mr. Smith,』 (note that a space is also added between the title and the last name) to conform to formal letter format requirements.
error_sentence: I know you will have some lessens in this term,and Iwant to take part in the Today America.

correct_sentence: I know you will have some lessons in this term, and I want to take part in the Today America.

error: lessens
correction: lessons
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to English word formation, 〈lessens〉, the third-person singular form of the verb 'to lessen', does not fit the context; it should be changed to the noun 『lessons』 (double 's') to correctly express the meaning of 'courses'.
error_sentence: I know you will have some lessens in this term,and Iwant to take part in the Today America.

correct_sentence: I know you will have some lessons in this term, and I want to take part in the Today America.

error: Iwant
correction: I want
error_type: Space Error
error_severity: 1
error_description: Space Error: According to English writing conventions, 〈Iwant〉 lacks the necessary space between the subject and the verb; it should be changed to 『I want』 (add a space) to conform to standard format requirements.
error_sentence: I can speak English fluently,so it isn't difficult for me to understand what you said.
correct_sentence: I can speak English fluently, so it isn't difficult for me to understand what you say.
error: said
correction: say
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: According to contextual semantic analysis, the clause in 〈understand what you said〉 describes a general ability to understand rather than a specific past event, so the past tense 『said』 is changed to the present tense 『say』, forming 『understand what you say』 to maintain tense consistency.
error_sentence: The reason why I whant to learn it is that I want to know some differences between America society and China society .And I like the freedom life and American's lifestyle.so I want to know some interesting things about it.

correct_sentence: The reason why I want to learn it is that I want to know some differences between American society and Chinese society.
error: whant
correction: want
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to basic English vocabulary spelling rules, the letter order in 〈whant〉 is incorrect; it should be changed to 『want』 (w-a-n-t) to correctly express the meaning 'to want'.
error_sentence: The reason why I whant to learn it is that I want to know some differences between America society and China society .And I like the freedom life and American's lifestyle.so I want to know some interesting things about it.

correct_sentence: The reason why I want to learn it is that I want to know some differences between American society and Chinese society.
error: America
correction: American
error_type: PoS Confusion Error
error_severity: 3
error_description: PoS Confusion Error: According to English grammar rules, an adjective is needed to modify the noun in 〈America society〉, so the noun 『America』 is changed to the adjective 『American』, forming the correct expression 『American society』.
error_sentence: The reason why I whant to learn it is that I want to know some differences between America society and China society .And I like the freedom life and American's lifestyle.so I want to know some interesting things about it.

correct_sentence: The reason why I want to learn it is that I want to know some differences between American society and Chinese society. And I like the free life and American lifestyle, so I want to know some interesting things about it.

error: China society .And
correction: Chinese society. And
error_type: PoS Confusion Error
error_severity: 4
error_description: ① PoS Confusion Error: According to English grammar rules, an adjective is needed to modify the noun in 〈China society〉, so the noun 『China』 is changed to the adjective 『Chinese』, forming the correct expression 『Chinese society』; ② Space Error: According to English punctuation usage conventions, there should be no space between a period and the preceding word, and there should be one space between it and the following word. Change 〈society .And〉 to 『society. And』 (remove the space before the period, add a space after the period) to conform to standard writing format.
error_sentence: The reason why I whant to learn it is that I want to know some differences between America society and China society .And I like the freedom life and American's lifestyle.so I want to know some interesting things about it.

correct_sentence: And I like the free life and American lifestyle, so I want to know some interesting things about it.

error: freedom
correction: free
error_type: PoS Confusion Error
error_severity: 3
error_description: PoS Confusion Error: According to English grammar rules, the noun 〈freedom〉 in 〈freedom life〉 cannot directly modify a noun; it should be changed to the adjective 『free』 to form the correct collocation 『free life』.
error_sentence: The reason why I whant to learn it is that I want to know some differences between America society and China society .And I like the freedom life and American's lifestyle.so I want to know some interesting things about it.

correct_sentence: And I like the free life and American lifestyle, so I want to know some interesting things about it.

error: 's lifestyle.so
correction: lifestyle, so
error_type: Noun Possessive Error
error_severity: 4
error_description: ① Noun Possessive Error: According to the rules for nouns used as attributives in English, the possessive form is not needed in 〈American's lifestyle〉; using the noun as an attributive 『American lifestyle』 can accurately express the meaning. ② Punctuation Error: According to English conjunction usage conventions, a comma needs to be added before the conjunction in 〈lifestyle.so〉, changing it to 『lifestyle, so』 (add a comma) to correctly separate sentence components, making the compound sentence structure complete and coherent. ③ Space Error: According to English written expression conventions, a space of one letter should be kept between a punctuation mark (comma or period) and the following word, therefore a space needs to be added and changed to 『, so』.
error_sentence: I am looking forward to receiving you reply.
correct_sentence: I am looking forward to receiving your reply.
error: you
correction: your
error_type: Pronoun Error
error_severity: 3
error_description: Pronoun Error: According to English possessive pronoun usage rules, a possessive form is needed in 〈you reply〉 to indicate possession; the subjective pronoun 『you』 is changed to the possessive 『your』, forming the correct expression 『your reply』.