Writing prompt: Written Expression.
Using the given vocabulary and sentence patterns, and referring to the picture, write a short essay.
Assume you are Tommy; please describe your life last weekend based on the picture and the hints.

Student essay:
My name is Tommy. My last weekend was very fun. I had a busy but enjoyable time. On Saturday morning I got up early. . I played in the park with my good friends. In the afternoon, I played basketball. On Sunday I started my day doing my homework. My familes cleaned the house together. In the evening i watched TV.

Corrected essay:
My name is Tommy. My last weekend was very fun. I had a busy but enjoyable time. On Saturday morning, I got up early. I played in the park with my good friends. In the afternoon, I played basketball. On Sunday, I started my day by doing my homework. My family cleaned the house together. In the evening, I watched TV.

Error analysis:
error_sentence: On Saturday morning I got up early. .
correct_sentence: On Saturday morning, I got up early.
correction: ,
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: When the time adverbial 〈On Saturday morning〉 is placed at the beginning of the sentence, it should be followed by a comma to separate it from the main clause; therefore, add 『,』 after 〈morning〉 to conform to English punctuation rules.
error_sentence: On Saturday morning I got up early. .
correct_sentence: On Saturday morning, I got up early.
error: .
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: The original sentence contains two consecutive periods 〈. .〉, which is redundant punctuation; therefore, the period 〈.〉 at the end of the sentence needs to be deleted to conform to English writing conventions.
error_sentence: On Sunday I started my day doing my homework.
correct_sentence: On Sunday, I started my day by doing my homework.
correction: ,
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: When the time adverbial 〈On Sunday〉 is used as the initial element of the sentence, it needs to be separated from the main clause by a comma. Therefore, add 『,』 after 〈Sunday〉 to conform to English punctuation rules.
error_sentence: On Sunday I started my day doing my homework.
correct_sentence: On Sunday, I started my day by doing my homework.
correction: by
error_type: Preposition Error
error_severity: 2
error_description: Preposition Error: According to the sentence's meaning, the original sentence intends to express 'On Sunday, I started my day by doing homework'; English typically uses 『by』 to introduce a gerund, indicating the means by which an action is completed; therefore, add 『by』 before 〈doing〉 to correctly express the meaning.
error_sentence: My familes cleaned the house together.
correct_sentence: My family cleaned the house together.
error: familes
correction: family
error_type: Noun Number Error
error_severity: 3
error_description: Noun Number Error: According to the sentence's meaning, the original sentence intends to express 'My family cleaned the house together'. In English, 'family' is a collective noun, usually used in its singular form to refer to a single family unit. This sentence describes the members of one family cleaning the house together, so the singular form 『family』 should be used. Therefore, 〈familes〉 should be changed to 『family』 to comply with grammatical rules.
error_sentence: In the evening i watched TV.
correct_sentence: In the evening, I watched TV.
error: i
correction: , I
error_type: Punctuation Error
error_severity: 3
error_description: ① Punctuation Error: The time adverbial 〈In the evening〉 is at the beginning of the sentence and needs to be separated from the main clause by a comma; therefore, add 『,』 after 〈evening〉 to conform to English punctuation rules; ② Case Error: According to English writing conventions, the first-person pronoun 『I』 must always be capitalized in a sentence, regardless of its position; therefore, 〈i〉 needs to be changed to 『I』 to conform to the rules.