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:
Mr Cool's Clothes Store now beginning sell the change very change. All kinds of wool clothes just sell the 30 yuan, short jeans sell the 20 yuan, jacket just sell the 25 yuan. A big bag sell the 35 yuan and a small bag sell the 20 yuan

Corrected essay:
Mr. Cool's Clothes Store is now having a big sale and the clothes are very cheap. All kinds of wool clothes just sell for 30 yuan, short jeans sell for 20 yuan, and shirts sell for just 25 yuan. A big bag sells for 35 yuan and a small bag sells for 20 yuan.

Error analysis:
error_sentence: Mr Cool's Clothes Store now beginning sell the change very change.
correct_sentence: Mr. Cool's Clothes Store is now having a big sale and the clothes are very cheap.
error: Mr
correction: Mr.
error_type: Punctuation Error
error_severity: 2
error_description: ① Punctuation Error: According to English conventions, the abbreviation 〈Mr〉 requires a period to form the complete abbreviation; therefore, 〈Mr〉 is changed to 『Mr.』 to comply with English writing standards.

error_sentence: Mr Cool's Clothes Store now beginning sell the change very change.
correct_sentence: Mr. Cool's Clothes Store is now having a big sale and the clothes are very cheap.
error: now beginning sell the change very change
correction: is now having a big sale and the clothes are very cheap
error_type: Sentence Structure Error
error_severity: 5
error_description: ① Verb Tense Error: Based on the context, '正在' indicates the present progressive tense. The original phrase 〈beginning sell〉 lacks the auxiliary verb 'be' and does not conform to the present progressive structure; thus, it is changed to 『is having』 to align with English grammatical structure; ② Sentence Structure Error: According to common English expressions, the original phrase 〈sell the change〉 fails to correctly convey the meaning of a sale; therefore, it is changed to 『having a big sale』 to fit English usage; ③ Spelling Error: According to the original sentence, the intended meaning is 'clothes'. Thus, 〈change〉 is a spelling error and should be corrected to 『clothes』 for clarity; ④ Spelling Error: Based on the sentence's meaning, the intention is to express 'cheap'. Therefore, 〈change〉 is a misspelling of 『cheap』 and needs to be corrected to 『cheap』 for clarity.

error_sentence: All kinds of wool clothes just sell the 30 yuan, short jeans sell the 20 yuan, jacket just sell the 25 yuan.
correct_sentence: All kinds of wool clothes just sell for 30 yuan, short jeans sell for 20 yuan, and shirts sell for just 25 yuan.
error: the
correction: for
error_type: Preposition Error
error_severity: 2
error_description: Preposition Error: According to English usage, the verb 〈sell〉 lacks the corresponding preposition when paired with a price; the preposition 『for』 is required. Therefore, 『the』 is changed to 『for』 to comply with English expression conventions.

error_sentence: All kinds of wool clothes just sell the 30 yuan, short jeans sell the 20 yuan, jacket just sell the 25 yuan.
correct_sentence: All kinds of wool clothes just sell for 30 yuan, short jeans sell for 20 yuan, and shirts sell for just 25 yuan.
error: the
correction: for
error_type: Preposition Error
error_severity: 2
error_description: ① Preposition Error: According to English usage, the verb 〈sell〉 lacks the corresponding preposition when paired with a price; the preposition 『for』 is required. Therefore, 『the』 is changed to 『for』 to comply with English expression conventions.

error_sentence: All kinds of wool clothes just sell the 30 yuan, short jeans sell the 20 yuan, jacket just sell the 25 yuan.
correct_sentence: All kinds of wool clothes just sell for 30 yuan, short jeans sell for 20 yuan, and shirts sell for just 25 yuan.
error: jacket just sell the
correction: and shirts sell for just
error_type: Word Order Error
error_severity: 5
error_description: ① Conjunction Error: According to English grammar rules, the clauses 〈short jeans sell the 20 yuan〉 and 〈jacket just sell the 25 yuan〉 have complete subject-verb structures. As parallel items, they require the conjunction 『and』 for connection to comply with English expression conventions; ② Noun Error: Based on the sentence's meaning, the intention is to express 'shirts'. 〈jacket〉 does not match the product category required by the original text and should be changed to 『shirts』 for clarity; ③ Preposition Error: According to English usage, the verb 〈sell〉 lacks the corresponding preposition when paired with a price; the preposition 『for』 is required. Therefore, it needs to be added and changed to 『for』 to comply with English expression conventions; ④ Determiner Error: According to English usage, when expressing 'sell for just... yuan', the prepositional phrase followed by the price does not require the determiner 〈the〉 for specific reference; therefore, 〈the〉 should be deleted; ⑤ Word Order Error: According to English syntax rules, the modifier 'just' when modifying a verb phrase should be placed after the verb phrase; therefore, 〈just〉 needs to be moved after 〈sell for〉.

error_sentence: A big bag sell the 35 yuan and a small bag sell the 20 yuan
correct_sentence: A big bag sells for 35 yuan and a small bag sells for 20 yuan.
error: sell the
correction: sells for
error_type: Subject-Verb Agreement Error
error_severity: 4
error_description: ① Subject-Verb Agreement Error: According to English grammar rules, there is a subject-verb agreement error. The subject 〈A big bag〉 is third-person singular, while the verb 〈sell〉 is in the plural form; therefore, the verb 〈sell〉 needs to be changed to the third-person singular form 『sells』 to maintain subject-verb agreement; ② Preposition Error: According to English usage, the verb 〈sell〉 lacks the corresponding preposition when paired with a price; the preposition 『for』 is required. Therefore, 『the』 is changed to 『for』 to comply with English expression conventions.

error_sentence: A big bag sell the 35 yuan and a small bag sell the 20 yuan
correct_sentence: A big bag sells for 35 yuan and a small bag sells for 20 yuan.
error: sell the
correction: sells for
error_type: Subject-Verb Agreement Error
error_severity: 4
error_description: ① Subject-Verb Agreement Error: According to English grammar rules, there is a subject-verb agreement error. 〈A big bag〉 is a third-person singular subject, while the original verb 〈sell〉 is in the third-person plural form; therefore, the verb 〈sell〉 needs to be changed to the third-person singular form 『sells』 to maintain subject-verb agreement; ② Preposition Error: According to English usage, the verb 〈sell〉 lacks the corresponding preposition when paired with a price; the preposition 『for』 is required. Therefore, 『the』 is changed to 『for』 to comply with English expression conventions.

error_sentence: A big bag sell the 35 yuan and a small bag sell the 20 yuan
correct_sentence: A big bag sells for 35 yuan and a small bag sells for 20 yuan.
correction: .
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: According to English writing conventions, a period is required at the end of the sentence. The original sentence ending in 〈yuan〉 lacks a 『.』; therefore, it is changed to 『yuan.』 to comply with writing standards.