Writing prompt: Write a short essay titled "My next weekend." Based on the picture information, use the future tense (be going to) to introduce your plans for next weekend.

Student essay:
My next weekend On next weekend. What is me going to do on next weekend? At next Friday, I'm going to learnning my grandparents chinese and math. At next Saturday. I'm halp my parents be housework. At Sunday I'm going to playing football with my friends. After play football, I'm going to write the letter.

Corrected essay:
My next weekend
What am I going to do next weekend? Next Friday, I'm going to teach my grandparents Chinese and math. Next Saturday, I will help my parents do housework. On Sunday I'm going to play football with my friends. After playing football, I'm going to write a letter.

Error analysis:
error_sentence: My next weekend On next weekend.
correct_sentence: My next weekend
What am I going to do next weekend?
error: next weekend On
error_type: Word Redundancy Error
error_severity: 5
error_description: ① Word Redundancy Error: According to English rules for time adverbials, 〈My next weekend〉 and 〈On next weekend〉 are semantically repetitive; therefore, the redundant prepositional phrase 〈On next weekend〉 is deleted, using only 〈My next weekend〉 as the title makes it more concise and natural.

error_sentence: My next weekend On next weekend. What is me going to do on next weekend?
correct_sentence: My next weekend
What am I going to do next weekend?
error: . What is me
correction: 
What am I
error_type: Format Error
error_severity: 5
error_description: ① Format Error: According to English writing conventions, when the title 〈My next weekend〉 serves as a separate paragraph, it should be separated from the main text by a blank line. Therefore, a newline character 『
』 is inserted after it for paragraph separation; ② Subject-Verb Agreement Error: According to English grammar rules, in an interrogative sentence, the first-person singular subject 〈I〉 must be paired with the be-verb 『am』. Thus, the incorrect third-person singular form 〈is〉 is corrected to 『am』, forming the correct verb structure 『am I』; ③ Pronoun Error: According to English pronoun usage, the subject of an interrogative sentence must use a subjective pronoun, whereas the original sentence incorrectly used the objective pronoun 〈me〉. Therefore, 〈me〉 is changed to the first-person subjective pronoun 『I』 to make the sentence grammatically correct. The corrected structure is: 『What am I going to do...?』.

error_sentence: What is me going to do on next weekend?
correct_sentence: My next weekend
What am I going to do next weekend?
error: on
error_type: Preposition Error
error_severity: 2
error_description: Preposition Error: According to English time expression conventions, the time adverbial 〈next weekend〉 is a fixed time phrase (similar to “next week/next year”) and does not require a preposition when used directly as an adverbial. Therefore, the redundant 〈on〉 is deleted to make the sentence conform to idiomatic English expression, corrected to 〈next weekend〉.

error_sentence: At next Friday, I'm going to learnning my grandparents chinese and math.
correct_sentence: Next Friday, I'm going to teach my grandparents Chinese and math.
error: At next
correction: Next
error_type: Preposition Error
error_severity: 2
error_description: Preposition Error: According to English time expression rules, a time phrase formed by 〈Next + day of the week〉 itself has a complete time indication function and does not require a preposition. Therefore, the incorrect preposition 〈At〉 is deleted, and the standard time expression 『Next Friday』 is used directly, conforming to English fixed time expression conventions.

error_sentence: At next Friday, I'm going to learnning my grandparents chinese and math.
correct_sentence: Next Friday, I'm going to teach my grandparents Chinese and math.
error: learnning
correction: teach
error_type: Verb Choice Error
error_severity: 3
error_description: ① Verb Choice Error: According to the sentence meaning, the verb 〈learnning〉 means 'learning', while the context here requires the meaning 'to teach'; therefore, 〈learnning〉 is changed to 『teach』 to accurately describe the subject teaching subjects to the grandparents. The original word 〈learnning〉 has a spelling error and incorrect meaning, hence it is entirely corrected to 『teach』; ② Nonfinite Verb Form Error: According to English grammar rules, the phrase 〈 going to 〉 must be followed by the base form of the verb (i.e., infinitive without to); therefore, the nonfinite verb 〈learning〉 is changed to the base form 『teach』, forming the correct structure 『going to teach』.

error_sentence: At next Friday, I'm going to learnning my grandparents chinese and math.
correct_sentence: Next Friday, I'm going to teach my grandparents Chinese and math.
error: chinese
correction: Chinese
error_type: Case Error
error_severity: 1
error_description: Case Error: According to English writing conventions, proper nouns representing countries, nationalities, or languages require capitalization of the first letter. The original word 〈chinese〉 refers to 'Chinese language' or 'Chinese', so it should be corrected to 『Chinese』 to comply with the rules for proper nouns.

error_sentence: At next Saturday. I'm halp my parents be housework.
correct_sentence: Next Saturday, I will help my parents do housework.
error: At next Saturday. I'm halp
correction: Next Saturday, I will help
error_type: Verb Tense Error
error_severity: 5
error_description: ① Preposition Error: According to English time expression rules, a time phrase formed by “Next + day of the week” itself has a complete time indication function and does not require a preposition. Therefore, the incorrect prepositional structure 〈At next〉 is deleted, and the standard time expression 『Next Saturday』 is used directly, conforming to English fixed time expression conventions; ② Punctuation Error: According to English written expression conventions, a comma is needed to connect the time adverbial and the main clause; therefore, 〈Saturday.〉 needs to be changed to a comma 『Saturday,』; ③ Verb Tense Error: According to the sentence meaning, the time adverbial 〈Next Saturday〉 indicates that the action will happen in the future, so the predicate verb should use the simple future tense (will + base form). The present continuous tense 〈I'm halp〉 in the original sentence is structurally incorrect and the tense is inappropriate; it should be entirely corrected to 『Next Saturday, I will help』 to ensure correct tense and semantic coherence; ④ Spelling Error: The verb 〈halp〉 is misspelled; the correct spelling should be 『help』, indicating the action of 'helping'. Therefore, the spelling needs to be corrected to accurately convey the meaning.

error_sentence: I'm halp my parents be housework.
correct_sentence: Next Saturday, I will help my parents do housework.
error: be
correction: do
error_type: Verb Choice Error
error_severity: 2
error_description: Verb Choice Error: According to idiomatic English expression, the correct verb collocation for 'doing housework' should be 『do housework』, not using the linking verb 〈be〉. Therefore, 〈be〉 in the original sentence is changed to 『do』, making the phrase conform to the standard collocation structure “do + housework”, ensuring semantic accuracy and natural expression.

error_sentence: At Sunday I'm going to playing football with my friends.
correct_sentence: On Sunday I'm going to play football with my friends.
error: At
correction: On
error_type: Preposition Error
error_severity: 2
error_description: Preposition Error: According to English grammar rules, the preposition 『On』 must be used before names of days of the week (e.g., Sunday, Monday) to indicate a specific day, not 〈At〉 (which is typically used for specific times or locations). Therefore, the incorrect 〈At Sunday〉 is corrected to the grammatically compliant 『On Sunday』 to ensure the correct pairing of preposition and time expression.

error_sentence: At Sunday I'm going to playing football with my friends.
correct_sentence: On Sunday I'm going to play football with my friends.
error: playing
correction: play
error_type: Nonfinite Verb Form Error
error_severity: 3
error_description: Nonfinite Verb Form Error: According to English grammar rules, “be going to” as a future tense structure must be followed by the base form of the verb to express a plan or an upcoming action. In the original sentence, 〈playing〉 is the present participle form, which does not meet the grammatical requirements of this structure; therefore, it is corrected to the base form 『play』, making the sentence structure conform to the standard collocation “be going to + base form”.

error_sentence: After play football, I'm going to write the letter.
correct_sentence: After playing football, I'm going to write a letter.
error: play
correction: playing
error_type: Nonfinite Verb Form Error
error_severity: 3
error_description: Nonfinite Verb Form Error: According to English grammar rules, the preposition 〈After〉 should be followed by a gerund (V-ing form) to form a prepositional phrase meaning 'after...'. In the original sentence, 〈play〉 is the base form of the verb, which does not meet the grammatical requirement following a preposition; therefore, it is corrected to the gerund 『playing』, forming the correct structure 『After playing』, ensuring syntactic correctness.

error_sentence: After play football, I'm going to write the letter.
correct_sentence: After playing football, I'm going to write a letter.
error: the
correction: a
error_type: Determiner Error
error_severity: 2
error_description: Determiner Error: According to English grammar rules, when mentioning or referring generally to a singular countable noun for the first time, the indefinite article 『a』 should be used instead of the definite article 〈the〉 (which is used for specific reference). In the original sentence, 〈the letter〉 incorrectly specifies the noun, while the context does not clearly refer to a specific letter; therefore, the determiner 〈the〉 is changed to 『a』, corrected to 『write a letter』 to fit the context of general reference.