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:
MrCool's Clothes Store is downing. All kind of clothes have 30 yuan. Shorts has 20 yuan. Shirts has 25 yuan. Big bags has 35 yuan. Handbags has 20 yuan. And have many beautiful shoes and dresses. Welcome it.

Corrected essay:
Mr. Cool's Clothes Store is having a big sale. All kinds of sweaters are only 30 yuan. Shorts are only 20 yuan. Shirts are only 25 yuan. Big bags are 35 yuan. Small bags are 20 yuan. And there are many beautiful shoes and dresses. Welcome!

Error analysis:
error_sentence: MrCool's Clothes Store is downing.
correct_sentence: Mr. Cool's Clothes Store is having a big sale.
error: MrCool
correction: Mr. Cool
error_type: Spelling Error
error_severity: 3
error_description: ① Spelling Error: According to English writing conventions, the proper noun 〈Mr〉 requires a period 『.』 to be the correct abbreviated form, so 〈Mr〉 in the original sentence needs to be changed to 『Mr.』 to conform to writing standards; ② Space Error: According to English writing conventions, a space is needed between 〈Mr〉 and 〈Cool〉, so 〈MrCool〉 is changed to 『Mr. Cool』 to conform to writing standards.

error_sentence: MrCool's Clothes Store is downing.
correct_sentence: Mr. Cool's Clothes Store is having a big sale.
error: downing
correction: having a big sale
error_type: Verb Choice Error
error_severity: 3
error_description: Verb Choice Error: According to the prompt, the sentence means "having a big sale"; 〈downing〉 in the original sentence cannot express the meaning of promotion and does not fit the context, so 〈downing〉 needs to be changed to 『having a big sale』 to fit the context.

error_sentence: All kind of clothes have 30 yuan.
correct_sentence: All kinds of sweaters are only 30 yuan.
error: kind of clothes have
correction: kinds of sweaters are only
error_type: Verb Choice Error
error_severity: 5
error_description: ① Noun Number Error: According to English grammar rules and context, 〈kind〉 in the original sentence should be in the plural form 『kinds』 to indicate "multiple types", conforming to English grammar and context; ② Noun Error: According to the prompt requirements, the sentence here means "sweaters"; 〈clothes〉 in the original sentence means "clothes", which is a noun error, so 〈clothes〉 needs to be changed to 『sweaters』 to meet the prompt requirements; ③ Verb Choice Error: According to the context, the intention here is to express "the price is..."; 〈have〉 in the original sentence means "possess", which does not fit the meaning, so 〈have〉 needs to be changed to 『are』 to fit the context, and 『only』 is added to emphasize the discount.

error_sentence: Shorts has 20 yuan.
correct_sentence: Shorts are only 20 yuan.
error: has
correction: are only
error_type: Verb Choice Error
error_severity: 3
error_description: Verb Choice Error: According to the sentence meaning, the intention here is to express "the price is..."; the subject 〈Shorts〉 is plural, so the verb 〈has〉 "possess" needs to be changed to 『are』, and 『only』 should be added to emphasize the discount.

error_sentence: Shirts has 25 yuan.
correct_sentence: Shirts are only 25 yuan.
error: has
correction: are only
error_type: Verb Choice Error
error_severity: 3
error_description: Verb Choice Error: According to the sentence meaning, the intention here is to express "the price is..."; the subject 〈Shirts〉 is plural, so the verb 〈has〉 "possess" needs to be changed to 『are』, and 『only』 should be added to emphasize the discount.

error_sentence: Big bags has 35 yuan.
correct_sentence: Big bags are 35 yuan.
error: has
correction: are
error_type: Subject-Verb Agreement Error
error_severity: 3
error_description: Verb Choice Error: According to the sentence meaning, the intention here is to express "the price is..."; the subject 〈Big bags〉 is plural, so the verb 〈has〉 "possess" needs to be changed to 『are』.

error_sentence: Handbags has 20 yuan.
correct_sentence: Small bags are 20 yuan.
error: Handbags has
correction: Small bags are
error_type: Verb Choice Error
error_severity: 5
error_description: ① Noun Error: According to the prompt requirements, the sentence here means "small bags"; 〈Handbags〉 in the original sentence means "handbags", which is a noun error, so 〈Handbags〉 needs to be changed to 『Small bags』 to meet the prompt requirements; ② Verb Choice Error: According to the sentence meaning, the intention here is to express "the price is..."; the subject 『Small bags』 is plural, so the verb 〈has〉 "possess" needs to be changed to 『are』.

error_sentence: And have many beautiful shoes and dresses.
correct_sentence: And there are many beautiful shoes and dresses.
error: have
correction: there are
error_type: Sentence Structure Error
error_severity: 4
error_description: Sentence Structure Error: According to English expression habits, the existential sentence structure requires 『there are』 instead of 〈have〉; the original sentence 〈have〉 lacks a subject, resulting in a sentence structure error, so 〈have〉 should be changed to 『there are』 to meet the contextual requirement.

error_sentence: Welcome it.
correct_sentence: Welcome!
error: it.
correction: !
error_type: Word Redundancy Error
error_severity: 4
error_description: ① Word Redundancy Error: According to English expression habits, the greeting 〈Welcome〉 is an independent imperative sentence and does not require the object 〈it〉; ② Punctuation Error: Ending the sentence with an exclamation mark 『!』 better fits the tone, so 〈it.〉 is changed to 『!』.