Writing prompt: Using the given vocabulary and sentence patterns, and referring to the picture, write a short essay. It is currently 7 PM. Based on the information provided by Linda below, use the present continuous tense to describe what Linda and her family are doing. Writing hints: Linda: help mother do housework; grandparents: watch TV; brother: play computer games; mother: cook; sister: listen to the radio.

Student essay:
At seven, Linda's grandparents are wtching TV, her brother is playing computer games, Linda is helping her mother with housework, her mother is cooking dinner. What is her sister doing now? Oh! she is listening the radio. What a great family!

Corrected essay:
At seven in the evening, Linda's grandparents are watching TV, her brother is playing computer games, Linda is helping her mother with housework, and her mother is cooking dinner. What is her sister doing now? Oh! She is listening to the radio. What a great family!

Error analysis:
error_sentence: At seven, Linda's grandparents are wtching TV, her brother is playing computer games, Linda is helping her mother with housework, her mother is cooking dinner.
correct_sentence: At seven in the evening, Linda's grandparents are watching TV, her brother is playing computer games, Linda is helping her mother with housework, and her mother is cooking dinner.
correction: in the evening
error_type: Other Error
error_severity: 2
error_description: Other Error: According to the prompt, the time is '7 PM'; the time adverbial 〈At seven〉 in the sentence is incomplete and does not specify the time frame, so the prepositional phrase 『in the evening』 needs to be added after 〈At seven〉 to clarify the time according to the prompt.
error_sentence: At seven, Linda's grandparents are wtching TV, her brother is playing computer games, Linda is helping her mother with housework, her mother is cooking dinner.
correct_sentence: At seven in the evening, Linda's grandparents are watching TV, her brother is playing computer games, Linda is helping her mother with housework, and her mother is cooking dinner.
error: wtching
correction: watching
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to the sentence meaning, the intention here is to express 'watching TV', thus 〈wtching〉 is a misspelling of 『watching』; 〈wtching〉 needs to be corrected to 『watching』 for the sentence to make sense.
error_sentence: At seven, Linda's grandparents are wtching TV, her brother is playing computer games, Linda is helping her mother with housework, her mother is cooking dinner.
correct_sentence: At seven in the evening, Linda's grandparents are watching TV, her brother is playing computer games, Linda is helping her mother with housework, and her mother is cooking dinner.
correction: and
error_type: Conjunction Error
error_severity: 4
error_description: Conjunction Error: According to English grammar rules, a conjunction is missing between multiple actions in the sentence; in the original sentence, 〈her mother is cooking dinner〉 is the last item in a parallel structure with 〈Linda is helping her mother with housework〉, requiring the addition of 『and』 to connect them, conforming to English expression habits.
error_sentence: she is listening the radio.
correct_sentence: She is listening to the radio.
error: she
correction: She
error_type: Case Error
error_severity: 1
error_description: Case Error: According to English writing conventions, the first letter of the word at the beginning of a sentence needs to be capitalized; in the original sentence, 〈she〉 is at the beginning of the sentence, so its first letter needs to be capitalized, thus 〈she〉 should be changed to 『She』 to comply with the convention.
error_sentence: she is listening the radio.
correct_sentence: She is listening to the radio.
correction: to
error_type: Preposition Error
error_severity: 3
error_description: ① Preposition Error: According to English grammar rules, the verb 〈listen〉 in the original sentence is intransitive and lacks the appropriate preposition, making the grammar incomplete; therefore, 『to』 should be added after 〈listen〉 so that 『listen to the radio』 conforms to English grammar rules.