Writing prompt: Using the information provided in Chinese and referring to the picture, write a short essay.
Mr. Cool's Clothes Store is having a big sale with great discounts. Sweaters in various colors are only 30 yuan, shorts are only 20 yuan, and shirts are only 25 yuan. Large bags sell for 35 yuan, and small bags for 20 yuan. There are also many beautiful shoes and skirts available. Welcome to shop.

Student essay:
This store is having a big sale. Very favorable, sweaters of various colors are only sold in 30 yuan, shorts are only sold in 20 yuan, and shirts are only sold in 25 yuan. Big bag 35, small bag 20, and many shoes, welcome to buy.

Corrected essay:
This store is having a big sale, and it is very favorable. Sweaters of various colors are only sold for 30 yuan, shorts are only sold for 20 yuan, and shirts are only sold for 25 yuan. Big bags are 35 yuan, small bags are 20 yuan, and there are many shoes. You are welcome to buy.

Error analysis:
error_sentence: This store is having a big sale. Very favorable, sweaters of various colors are only sold in 30 yuan, shorts are only sold in 20 yuan, and shirts are only sold in 25 yuan.
correct_sentence: This store is having a big sale, and it is very favorable. Sweaters of various colors are only sold for 30 yuan, shorts are only sold for 20 yuan, and shirts are only sold for 25 yuan.
error: . Very favorable, sweaters
correction: , and it is very favorable. Sweaters
error_type: Sentence Structure Error
error_severity: 5
error_description: ① Conjunction Error: According to English syntax rules and the original sentence meaning, the original sentences 〈This store is having a big sale〉 and 〈 Very favorable〉 should be two parallel clauses in the same compound sentence, and there is a close sequential relationship in meaning, so a comma and a conjunction are needed for connection. It is necessary to change 〈.〉 to 『, and』 to conform to English syntax rules and make the meaning closely connected.; ② Sentence Structure Error: According to the original sentence meaning, it intends to express "very suitable". The original sentence lacks a subject and a predicate verb, resulting in an incomplete sentence structure. It is necessary to change 〈Very favorable〉 to 『it is very favorable』 to complete the sentence structure.; ③ Punctuation Error: According to English syntax rules, the end of an independent sentence needs to be marked with corresponding punctuation to indicate the end of the sentence. The original sentence lacks a period at the end. It is necessary to change the 〈.〉 after 〈favorable〉 to 『.』 to mark the end of the sentence to conform to English syntax rules.; ④ Case Error: According to English syntax rules, the first letter of the first word of a sentence needs to be capitalized. Therefore, it is necessary to change 〈sweaters〉 to 『Sweaters』 here.
error_sentence: Very favorable, sweaters of various colors are only sold in 30 yuan, shorts are only sold in 20 yuan, and shirts are only sold in 25 yuan.
correct_sentence: Sweaters of various colors are only sold for 30 yuan, shorts are only sold for 20 yuan, and shirts are only sold for 25 yuan.
error: in
correction: for
error_type: Preposition Error
error_severity: 2
error_description: Preposition Error: According to English grammar rules, the verb “sell” is followed by the preposition “for” to form the fixed phrase “sell for + specific price” meaning “sold for xxx”. Therefore, it is necessary to change the preposition 〈in〉 to 『for』 to conform to the original sentence meaning and English fixed phrases.
error_sentence: Very favorable, sweaters of various colors are only sold in 30 yuan, shorts are only sold in 20 yuan, and shirts are only sold in 25 yuan.
correct_sentence: Sweaters of various colors are only sold for 30 yuan, shorts are only sold for 20 yuan, and shirts are only sold for 25 yuan.
error: in
correction: for
error_type: Preposition Error
error_severity: 2
error_description: Preposition Error: According to English grammar rules, the verb “sell” is followed by the preposition “for” to form the fixed phrase “sell for + specific price” meaning “sold for xxx”. Therefore, it is necessary to change the preposition 〈in〉 to 『for』 to conform to the original sentence meaning and English fixed phrases.
error_sentence: Very favorable, sweaters of various colors are only sold in 30 yuan, shorts are only sold in 20 yuan, and shirts are only sold in 25 yuan.
correct_sentence: Sweaters of various colors are only sold for 30 yuan, shorts are only sold for 20 yuan, and shirts are only sold for 25 yuan.
error: in
correction: for
error_type: Preposition Error
error_severity: 2
error_description: Preposition Error: According to English grammar rules, the verb “sell” is followed by the preposition “for” to form the fixed phrase “sell for + specific price” meaning “sold for xxx”. Therefore, it is necessary to change the preposition 〈in〉 to 『for』 to conform to the original sentence meaning and English fixed phrases.
error_sentence: Big bag 35, small bag 20, and many shoes, welcome to buy.
correct_sentence: Big bags are 35 yuan, small bags are 20 yuan, and there are many shoes.
error: bag 35
correction: bags are 35 yuan
error_type: Sentence Structure Error
error_severity: 5
error_description: ① Noun Number Error: Referring to the large bags sold in the store, a plural form is needed for generalization. 〈bag〉 needs to be changed to the plural form 『bags』 to fit the original context.; ② Sentence Structure Error: According to the original sentence meaning, it intends to express “Big bags sell for 35 yuan”. The original sentence lacks a predicate verb and price unit, resulting in an incomplete sentence structure. It is necessary to change 〈bags 35〉 to 『bags are 35 yuan』 to complete the sentence structure and conform to the original sentence meaning.
error_sentence: Big bag 35, small bag 20, and many shoes, welcome to buy.
correct_sentence: Big bags are 35 yuan, small bags are 20 yuan, and there are many shoes.
error: bag 20
correction: bags are 20 yuan
error_type: Sentence Structure Error
error_severity: 5
error_description: ① Noun Number Error: Referring to the large bags sold in the store, a plural form is needed for generalization. 〈bag〉 needs to be changed to the plural form 『bags』 to fit the original context.; ② Sentence Structure Error: According to the original sentence meaning, it intends to express “Big bags sell for 35 yuan”. The original sentence lacks a predicate verb and price unit, resulting in an incomplete sentence structure. It is necessary to change 〈bags 35〉 to 『bags are 35 yuan』 to complete the sentence structure and conform to the original sentence meaning.
error_sentence: Big bag 35, small bag 20, and many shoes, welcome to buy.
correct_sentence: Big bags are 35 yuan, small bags are 20 yuan, and there are many shoes.
correction: there are
error_type: Sentence Structure Error
error_severity: 4
error_description: Sentence Structure Error: According to the original sentence meaning, it intends to express “there are also many shoes here”, and an existential sentence pattern should be used for introduction. Therefore, it is necessary to add 『there are』 before 〈many shoes〉 to complete the existential sentence structure and conform to the original sentence meaning.
error_sentence: Big bag 35, small bag 20, and many shoes, welcome to buy.
correct_sentence: Big bags are 35 yuan, small bags are 20 yuan, and there are many shoes. You are welcome to buy.
error: ,
correction: . You are
error_type: Sentence Structure Error
error_severity: 5
error_description: ① Punctuation Error: According to English syntax rules, the clauses 〈and there are many shoes〉 and 〈welcome to buy〉 contain independent subject-verb structures and belong to two different idea groups, so they need to be separate sentences, separated by a period. 〈,〉 should be changed to 『.』 to conform to English syntax rules.; ② Sentence Structure Error: According to the original context, it intends to express “Customers are welcome to shop”. English often uses the second person to convey a calling meaning to shorten the distance with readers. The readers here are potential customers, so the original imperative sentence 『welcome to buy』 needs to be changed to 『You are welcome to buy 』 to conform to English expression habits and the original context.