Writing prompt: Using the given vocabulary and sentence patterns, and referring to the picture, write a short essay. It is 3 PM. Based on the information provided below about Linda, use the present continuous tense to describe what Linda sees and hears at the mall:
Writing hints:
A little girl: buy some food
A young lady: look at a dress
Linda's mother: try on the shoes
Linda's father: stay on the sofa; wait for

Student essay:
I'm Linda. Today is saturday. What a sunny day! I'm in a supermarket to go shopping with my parents. Look, there is a little girl, she is buying some food. And a young lady, she is looking at a dress that is suitable for her. Look at the beautiful woman, she is my mother. She is trying the shoes she likes. And my father is staying on the sofa to wait for my mother.

Corrected essay:
I'm Linda. Today is Saturday. What a sunny day! I'm in a supermarket to go shopping with my parents. Look, there is a little girl. She is buying some food. And a young lady is looking at a dress that is suitable for her. Look at the beautiful woman. She is my mother. She is trying on the shoes she likes. And my father is staying on the sofa to wait for my mother.

Error analysis:
error_sentence: Today is saturday.
correct_sentence: Today is Saturday.
error: saturday
correction: Saturday
error_type: Case Error
error_severity: 1
error_description: Case Error: The day name 〈saturday〉 is a proper noun and should be capitalized according to English writing conventions; therefore, 〈saturday〉 is corrected to 『Saturday』.

error_sentence: Look, there is a little girl, she is buying some food.
correct_sentence: Look, there is a little girl. She is buying some food.
error: , she
correction: . She
error_type: Punctuation Error
error_severity: 1
error_description: ① Punctuation Error: The two independent clauses 〈there is a little girl〉 and 〈she is buying some food〉 should be separated by a period, not a comma; therefore, 〈,〉 is corrected to 『.』; ② Case Error: After correcting the punctuation, 〈she〉 begins the new sentence and should be capitalized according to English writing rules; therefore, 〈she〉 is corrected to 『She』.

error_sentence: And a young lady, she is looking at a dress that is suitable for her.
correct_sentence: And a young lady is looking at a dress that is suitable for her.
error: , she
error_type: Sentence Structure Error
error_severity: 5
error_description: Sentence Structure Error: Connecting the two independent clauses 〈a young lady〉 and 〈she is looking at a dress〉 with a comma results in an improper sentence structure; the first clause lacks a predicate after the subject 〈a young lady〉, making it incomplete and violating English sentence structure rules. Furthermore, based on the context, 〈she〉 refers to the same person as 〈a young lady〉, and since 〈a young lady〉 is introduced here, using 〈she〉 is inappropriate. Therefore, 〈, she〉 needs to be deleted, keeping 〈a young lady〉, and the sentence should be changed to 『And a young lady is looking at a dress』 to maintain structural integrity.

error_sentence: Look at the beautiful woman, she is my mother.
correct_sentence: Look at the beautiful woman. She is my mother.
error: , she
correction: . She
error_type: Punctuation Error
error_severity: 1
error_description: ① Punctuation Error: The two independent clauses 〈Look at the beautiful woman〉 and 〈she is my mother〉 should be separated by a period, not a comma; therefore, 〈,〉 is corrected to 『.』; ② Case Error: After correcting the punctuation, 〈she〉 begins the new sentence and should be capitalized according to English writing rules; therefore, 〈she〉 is corrected to 『She』.

error_sentence: She is trying the shoes she likes.
correct_sentence: She is trying on the shoes she likes.
correction: on
error_type: Preposition Error
error_severity: 1
error_description: Preposition Error: According to the prompt requirements, 'try on' is the fixed phrasal verb for trying on clothes/shoes. The verb 〈trying〉 needs the preposition 『on』 to express the action of trying on shoes; therefore, 『on』 is added after 〈trying〉 to make the sentence more accurate.