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:
It's 3 p.m. now. A little girl is buying some food and a woman is looking at a dress. Linda's mother is trying the shoes and her father is staying on the sofa; waiting for my mother

Corrected essay:
It's 3 p.m. now. A little girl is buying some food and a woman is looking at a dress. Linda's mother is trying on the shoes and her father is staying on the sofa. He is waiting for Linda's mother.

Error analysis:
error_sentence: Linda's mother is trying the shoes and her father is staying on the sofa; waiting for my mother
correct_sentence: Linda's mother is trying on the shoes and her father is staying on the sofa.
correction: on
error_type: Preposition Error
error_severity: 2
error_description: Preposition Error: According to the English fixed phrase, the preposition 〈on〉 in the phrasal verb 〈try on〉 is used to express the complete action of trying on clothes; omitting the preposition leads to incomplete meaning. Therefore, the missing preposition 『on』 needs to be added between the present participle 〈trying〉 and the object 〈the shoes〉 to form the grammatically correct phrasal verb 『trying on the shoes』.

error_sentence: Linda's mother is trying the shoes and her father is staying on the sofa; waiting for my mother
correct_sentence: Linda's mother is trying on the shoes and her father is staying on the sofa. He is waiting for Linda's mother.
error: ;
correction: . He is
error_type: Sentence Structure Error
error_severity: 3
error_description: ① Punctuation Error: According to English grammar rules, a semicolon 〈;〉 cannot be used to connect two independent clauses; a period should be used to make the sentence structure complete. Therefore, the semicolon 〈;〉 is changed to a period 『.』 to achieve correct sentence separation; ② Sentence Structure Error: Based on the contextual meaning, the missing subject in the latter clause leads to unclear reference; the personal pronoun 『He』 needs to be added to clarify that the performer of the action is 〈Linda's father〉. Therefore, the participle structure 〈waiting〉 is modified to the complete subject-verb structure 『He is waiting』, making the sentence logically clear and grammatically correct.

error_sentence: Linda's mother is trying the shoes and her father is staying on the sofa; waiting for my mother
correct_sentence: He is waiting for Linda's mother.
error: my mother
correction: Linda's mother.
error_type: Pronoun Error
error_severity: 3
error_description: ① Pronoun Error: According to the contextual logic, the possessive pronoun in 〈my mother〉 conflicts with the narrator (Linda's father) in person; the first-person possessive pronoun 〈my〉 needs to be changed to the third-person possessive 『Linda's』 to maintain consistent reference. Therefore, 〈my mother〉 is corrected to 『Linda's mother』 to ensure accurate representation of relationships; ② Punctuation Error: The original sentence is a complete sentence; based on English writing conventions, a period 『.』 needs to be added at the end of the sentence.