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:
I am Tommy. Last week, I had a good time! On Saturday morning, I got up early. I wen to the park to play with friends. I saw many children in the park, for example, two boys were playing soccer and a little boy was riding bike. In the afternoon, I played basketball with classmates. It is a good way to keep healthy. On Sunday morning, I did my homework at 8:00. After finishing my homework, I began to clean my room. At 18:00, I watched TV at home.

Corrected essay:
I am Tommy. Last week, I had a good time! On Saturday morning, I got up early. I went to the park to play with friends. I saw many children in the park. For example, two boys were playing soccer and a little boy was riding a bike. In the afternoon, I played basketball with my classmates. It is a good way to keep healthy. On Sunday morning, I did my homework at 8:00 a.m. After finishing my homework, I began to clean my room. At 18:00, I watched TV at home.

Error analysis:
error_sentence: I wen to the park to play with friends.
correct_sentence: I went to the park to play with friends.
error: wen
correction: went
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to English irregular verb conjugation rules, the past tense form 〈wen〉 of the verb 'go' has an incorrect letter order. The correct spelling should be 『went』, meaning 'to go', conforming to the irregular conjugation pattern of 'go'. This correction addresses the common confusion among beginners regarding the spelling of irregular past tense verbs.
error_sentence: I saw many children in the park, for example, two boys were playing soccer and a little boy was riding bike.
correct_sentence: I saw many children in the park. For example, two boys were playing soccer and a little boy was riding a bike.
error: , for
correction: . For
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: According to English punctuation rules for compound sentences, two independent clauses 〈I saw many people in the park〉 and 〈for example, some were jogging〉 cannot be joined solely by a comma. A period must be used to separate them into two distinct sentences, creating a grammatically correct structure: 『I saw many people in the park. For example, some were jogging.』. Since the preceding sentence now ends with a period, the following phrase 〈for example〉 starts a new sentence, requiring its first letter to be capitalized. Therefore, the lowercase 〈for〉 is corrected to uppercase 『For』, forming the standard sentence-initial format 『For example』, fully adhering to basic English writing conventions.
error_sentence: I saw many children in the park, for example, two boys were playing soccer and a little boy was riding bike.
correct_sentence: For example, two boys were playing soccer and a little boy was riding a bike.
correction: a
error_type: Determiner Error
error_severity: 2
error_description: Determiner Error: According to the usage rules for singular countable nouns in English, when 〈bike〉 appears alone as a countable noun, it must be preceded by the indefinite article 『a』 to form 『a bike』, conforming to the 'article + singular countable noun' grammatical structure. Omitting the article in the original sentence results in an incomplete noun phrase; the correction accurately expresses the singular concept of 'one bicycle'.
error_sentence: In the afternoon, I played basketball with classmates.
correct_sentence: In the afternoon, I played basketball with my classmates.
correction: my
error_type: Determiner Error
error_severity: 2
error_description: Determiner Error: According to English conventions for expressing possession with nouns, the group noun 〈classmates〉 requires specification of ownership. Adding the possessive pronoun 『my』 to form 『my classmates』 both satisfies the grammatical requirement of 'possessive pronoun + plural noun' and clearly indicates the possessive relationship 'my classmates', avoiding semantic ambiguity.
error_sentence: On Sunday morning, I did my homework at 8:00.
correct_sentence: On Sunday morning, I did my homework at 8:00 a.m.
error: .
correction: a.m.
error_type: Noun Error
error_severity: 2
error_description: Noun Error: According to English time expression conventions, a numerical time like 〈8:00〉 representing a specific moment must be accompanied by a time period indicator. In this context, referring to the morning, 『a.m.』 (abbreviation for ante meridiem) needs to be added as a standard time qualifier, forming the complete expression 『8:00 a.m.』. This correction meets the requirements for time formatting in written English and avoids potential ambiguity from colloquial expressions.