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 is very cheap. Many different colours sweaters need 30 yuan. Short need 20 yuan. Shirt need 25 yuan. Big bag need 35 yuan. small bag need 20 yuan. And there are lots of beautiful dresses and shoes.

Corrected essay:
Mr. Cool's Clothes Store's clothes are very cheap. Many different coloured sweaters sell for 30 yuan. The shorts sell for 20 yuan. The shirts sell for 25 yuan. The big bags sell for 35 yuan. The small bags sell for 20 yuan. And there are lots of beautiful dresses and shoes.

Error analysis:
error_sentence: Mr. Cool's Clothes Store is very cheap.
correct_sentence: Mr. Cool's Clothes Store's clothes are very cheap.
error: is
correction: 's clothes are
error_type: Subject-Verb Agreement Error
error_severity: 5
error_description: ① Noun Error: According to the context, the sentence intends to express that 'the clothes in the clothing store are cheap', not that 'the clothing store is cheap'. The subject 〈Mr. Cool's Clothes Store〉 cannot be paired with 〈cheap〉; therefore, the subject is replaced with 『clothes』 forming the possessive 『Store's clothes』; ② Subject-Verb Agreement Error: According to the principle of subject-verb agreement, since the subject is plural, the verb should also be plural, so 〈is〉 is changed to 『are』 to comply with the subject-verb agreement principle.

error_sentence: Many different colours sweaters need 30 yuan.
correct_sentence: Many different coloured sweaters sell for 30 yuan.
error: colours sweaters need
correction: coloured sweaters sell for
error_type: PoS Confusion Error
error_severity: 5
error_description: ① PoS Confusion Error: According to the context, 〈colours〉 is a noun, but an adjective 『coloured』 is needed here to modify 〈sweaters〉; ② Verb Choice Error: In English, product pricing should use the fixed phrase 〈sell for〉 instead of 〈need〉, so 『need』 is changed to 『sell for』.

error_sentence: Short need 20 yuan.
correct_sentence: The shorts sell for 20 yuan.
error: Short need
correction: The shorts sell for
error_type: Verb Choice Error
error_severity: 5
error_description: ① Determiner Error: In English, the definite article 'the' needs to be added to clearly specify the product category, here referring to the category of 'shorts', so the definite article 'the' is added. Since it's at the beginning of the sentence, the first letter is capitalized, changing it to 『The』; ② Noun Number Error: In English, when 〈Short〉 is used as a clothing category, the plural form 『shorts』 is required to mean 'shorts'; ③ Verb Choice Error: According to the context, the English expression for 'sell at a price of...' is 『sell for』, not 〈need〉, so 〈need〉 is changed to 『sell for』.

error_sentence: Shirt need 25 yuan.
correct_sentence: The shirts sell for 25 yuan.
error: Shirt need
correction: The shirts sell for
error_type: Verb Choice Error
error_severity: 5
error_description: ① Determiner Error: In English, the definite article 'the' needs to be added to clearly specify the product category, here referring to the category of 'shirts', so the definite article 'the' is added. Since it's at the beginning of the sentence, the first letter is capitalized, changing it to 『The』; ② Noun Number Error: In English, when 〈Shirt〉 is used as a clothing category, the plural form 『shirts』 is required to mean 'shirts'; ③ Verb Choice Error: According to the context, the English expression for 'sell at a price of...' is 『sell for』, not 〈need〉, so 〈need〉 is changed to 『sell for』.

error_sentence: Big bag need 35 yuan.
correct_sentence: The big bags sell for 35 yuan.
error: Big bag need
correction: The big bags sell for
error_type: Verb Choice Error
error_severity: 5
error_description: ① Determiner Error: In English, the definite article 'the' needs to be added to clearly specify the product category, here referring to the category of 'big bags', so the definite article 'the' is added. Since it's at the beginning of the sentence, the first letter is capitalized, changing it to 『The』; ② Noun Number Error: In English, when 〈big bag〉 is used as a bag category, the plural form 『big bags』 is required to mean 'big bags'; ③ Verb Choice Error: According to the context, the English expression for 'sell at a price of...' is 『sell for』, not 〈need〉, so 〈need〉 is changed to 『sell for』.

error_sentence: small bag need 20 yuan.
correct_sentence: The small bags sell for 20 yuan.
error: small bag need
correction: The small bags sell for
error_type: Verb Choice Error
error_severity: 5
error_description: ① Determiner Error: In English, the definite article 'the' needs to be added to clearly specify the product category, here referring to the category of 'small bags', so the definite article 'the' is added. Since it's at the beginning of the sentence, the first letter is capitalized, changing it to 『The』; ② Noun Number Error: In English, when 〈small bag〉 is used as a bag category, the plural form 『small bags』 is required to mean 'small bags'; ③ Verb Choice Error: According to the context, the English expression for 'sell at a price of...' is 『sell for』, not 〈need〉, so 〈need〉 is changed to 『sell for』.