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:
In the 7:00pm Linda and her family at home Linda is helping mother do housework grandparents are watching TV Her brother is playing computer games her mother is cooking her sister is listening to the radio they have a good time

Corrected essay:
At 7:00 pm, Linda and her family are at home. Linda is helping her mother do housework. Grandparents are watching TV. Her brother is playing computer games. Her mother is cooking. Her sister is listening to the radio. They have a good time.

Error analysis:
error_sentence: In the 7:00pm Linda and her family at home Linda is helping mother do housework grandparents are watching TV
correct_sentence: At 7:00 pm, Linda and her family are at home.
error: In the 7:00pm
correction: At 7:00 pm,
error_type: Preposition Error
error_severity: 5
error_description: ① Preposition Error: According to the original phrase 〈In the 7:00pm〉, the intention is to use a specific time point as an adverbial of time, but the preposition 〈In〉 is used for periods of time, not specific time points; 『At』 should be used to indicate a specific time point, hence it should be changed to 『At 7:00 pm』; ② Determiner Error: According to determiner usage, the definite article 〈the〉 is not needed when describing a specific time point; the correct expression is the preposition 『At』 directly followed by the time point; ③ Space Error: According to English writing conventions, the time format should have a space between the number and pm, so it is corrected to 『7:00 pm』; ④ Punctuation Error: According to English writing conventions, when the time adverbial 『At 7:00 pm』 is at the beginning of a sentence, it is usually followed by a 『,』.
error_sentence: In the 7:00pm Linda and her family at home Linda is helping mother do housework grandparents are watching TV
correct_sentence: At 7:00 pm, Linda and her family are at home.
correction: are
error_type: Verb Choice Error
error_severity: 3
error_description: Verb Choice Error: From the original phrase 〈Linda and her family at home〉, it can be seen that the sentence structure should be subject-verb-complement, but the linking verb is missing after the subject. Therefore, a linking verb needs to be added. Since the subject 〈Linda and her family〉 is plural, 『are』 should be added after 〈Linda and her family〉 to form a complete sentence structure.
error_sentence: In the 7:00pm Linda and her family at home Linda is helping mother do housework grandparents are watching TV
correct_sentence: At 7:00 pm, Linda and her family are at home.
correction: .
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: From the original sentence 〈In the 7:00pm Linda and her family at home〉, it can be seen that this is an independent and complete sentence, and the following sentence 〈Linda is helping mother do housework〉 is also a complete main clause. The original text joins two independent main clauses directly without punctuation between them, so a 『.』 needs to be added after 〈home〉 to separate the two independent main clauses.
error_sentence: In the 7:00pm Linda and her family at home Linda is helping mother do housework grandparents are watching TV
correct_sentence: Linda is helping her mother do housework.
correction: her
error_type: Determiner Error
error_severity: 3
error_description: Determiner Error: In the original description 〈Linda is helping mother〉, the possessive pronoun 『her』 needs to be added before 〈mother〉 to specify the singular countable noun and clarify the kinship relationship; omitting the determiner 『her』 could lead to ambiguity of general reference, thus it needs to be changed to 『Linda is helping her mother』.
error_sentence: In the 7:00pm Linda and her family at home Linda is helping mother do housework grandparents are watching TV
correct_sentence: Linda is helping her mother do housework. Grandparents are watching TV.
error: grandparents
correction: . Grandparents
error_type: Punctuation Error
error_severity: 4
error_description: ① Punctuation Error: From the original sentence 〈Linda is helping mother do housework〉, it can be seen that this is an independent and complete sentence, and the following sentence 〈grandparents are watching TV〉 is also a complete main clause. The original text joins two independent main clauses directly without a conjunction or punctuation between them, so a 『.』 needs to be added after 〈housework〉 to separate the two independent main clauses; ② Case Error: According to English writing rules, the first letter of a sentence needs to be capitalized, so 〈grandparents〉 is changed to 『Grandparents』 to start the independent sentence.
error_sentence: In the 7:00pm Linda and her family at home Linda is helping mother do housework grandparents are watching TV Her brother is playing computer games her mother is cooking her sister is listening to the radio they have a good time
correct_sentence: Grandparents are watching TV.
correction: .
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: From the original sentence 〈grandparents are watching TV〉, it can be seen that this is an independent and complete sentence, and the following sentence 〈Her brother is playing computer games〉 is also a complete main clause. The original text joins two independent main clauses directly without a conjunction or punctuation between them, so a 『.』 needs to be added after 〈TV〉 to separate the two independent main clauses.
error_sentence: Her brother is playing computer games her mother is cooking her sister is listening to the radio they have a good time
correct_sentence: Her brother is playing computer games. Her mother is cooking.
error: her
correction: . Her
error_type: Punctuation Error
error_severity: 3
error_description: ① Punctuation Error: From the original sentence 〈Her brother is playing computer games〉, it can be seen that this is an independent and complete sentence, and the following sentence 〈her mother is cooking〉 is also a complete main clause. The original text joins two independent main clauses directly without a conjunction or punctuation between them, so a 『.』 needs to be added after 〈Her brother is playing computer games〉 to separate the two independent main clauses; ② Case Error: Since the second sentence 〈her mother is cooking〉 is also a complete and independent sentence, the first letter of the first word needs to be capitalized, changing 〈her〉 to 『Her』.
error_sentence: Her brother is playing computer games her mother is cooking her sister is listening to the radio they have a good time
correct_sentence: Her mother is cooking. Her sister is listening to the radio.
error: her
correction: . Her
error_type: Punctuation Error
error_severity: 3
error_description: ① Punctuation Error: From the original sentence 〈her mother is cooking〉, it can be seen that this is an independent and complete sentence, and the following sentence 〈her sister is listening to the radio〉 is also a complete main clause. The original text joins two independent main clauses directly without a conjunction or punctuation between them, so a 『.』 needs to be added after 〈her mother is cooking〉 to separate the two independent main clauses; ② Case Error: Since the second sentence 〈her sister is listening to the radio〉 is also a complete and independent sentence, the first letter of the first word needs to be capitalized, changing 〈her〉 to 『Her』.
error_sentence: Her brother is playing computer games her mother is cooking her sister is listening to the radio they have a good time
correct_sentence: Her sister is listening to the radio. They have a good time.
error: they
correction: . They
error_type: Punctuation Error
error_severity: 3
error_description: ① Punctuation Error: From the original sentence 〈her sister is listening to the radio〉, it can be seen that this is an independent and complete sentence, and the following sentence 〈they have a good time〉 is also a complete main clause. The original text joins two independent main clauses directly without a conjunction or punctuation between them, so a 『.』 needs to be added after 〈her sister is listening to the radio〉 to separate the two independent main clauses; ② Case Error: Since the original sentence 〈they have a good time〉 is also a complete and independent sentence, the first letter of the first word needs to be capitalized, changing 〈they〉 to 『They』.
error_sentence: Her brother is playing computer games her mother is cooking her sister is listening to the radio they have a good time
correct_sentence: They have a good time.
correction: .
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: According to English writing conventions, from the original sentence 〈they have a good time〉, it can be seen that this is an independent and complete sentence located at the end of the paragraph. The sentence lacks end punctuation 『.』 to conclude it, so a 『.』 needs to be added after 〈time〉 to comply with writing conventions.