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:
It's seven o'clock now. Linda is helping mother doing housework and her grandparents are watching TV. Her little brother is playing the computer games and her mother is cooking, her sister is listening to the music. What a good family!

Corrected essay:
It's seven o'clock now. Linda is helping her mother do housework and her grandparents are watching TV. Her little brother is playing computer games and her mother is cooking, and her sister is listening to music. What a good family!

Error analysis:
error_sentence: Linda is helping mother doing housework and her grandparents are watching TV.
correct_sentence: Linda is helping her mother do housework and her grandparents are watching TV.
error: mother doing
correction: her mother do
error_type: Nonfinite Verb Form Error
error_severity: 3
error_description: ① Determiner Error: According to English grammar rules, when referring to family members, a possessive determiner is usually required. The original sentence lacks a determiner before 〈mother〉; 『her』 should be added before 〈mother〉 to clarify the possessive relationship between "mother" and "Linda". ② Nonfinite Verb Form Error: The common structure for the verb "help" is "help sb. do sth.", which means it is followed by a bare infinitive (without "to"). The original phrase 〈helping mother doing housework〉 does not conform to this structure; 〈doing〉 should be changed to 『do』, forming 『helping her mother do housework』 to comply with grammatical rules.
error_sentence: Her little brother is playing the computer games and her mother is cooking, her sister is listening to the music.
correct_sentence: Her little brother is playing computer games and her mother is cooking, and her sister is listening to music.
error: the
error_type: Determiner Error
error_severity: 2
error_description: Determiner Error: According to English grammar rules, "computer games" here is a generic plural noun and does not require a definite article for modification. The use of 〈the〉 in the original sentence does not comply with the rules for using articles with generic nouns in English; 〈the〉 should be deleted to make the expression idiomatic.
error_sentence: Her little brother is playing the computer games and her mother is cooking, her sister is listening to the music.
correct_sentence: Her little brother is playing computer games and her mother is cooking, and her sister is listening to music.
correction: and
error_type: Conjunction Error
error_severity: 3
error_description: Conjunction Error: According to English grammar rules, in a compound sentence with multiple independent clauses, a conjunction is needed to connect the last two independent clauses to avoid a comma splice error. In the original sentence, 〈her mother is cooking〉 and 〈her sister is listening to music〉 are two independent clauses lacking a conjunction; 『and』 should be added between 〈cooking〉 and 〈her sister〉 to ensure correct sentence structure and coherence.
error_sentence: Her little brother is playing the computer games and her mother is cooking, her sister is listening to the music.
correct_sentence: Her little brother is playing computer games and her mother is cooking, and her sister is listening to music.
error: the
error_type: Determiner Error
error_severity: 2
error_description: Determiner Error: According to English grammar rules, "music" as an uncountable noun does not require a definite article when used in a general sense. In the original phrase 〈the music〉, 〈the〉 has no specific reference and is used improperly; 〈the〉 should be deleted to comply with the rules for using articles with uncountable nouns in English.