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 is very interesting. on saterday I with my fammily are visiting to grandparent in the moring. in the afternoon , I with my sister are helping momter to clean floor. on sunday I am playing to computer. in afernoon I with my friends playing football.

Corrected essay:
My next weekend is going to be very interesting. On Saturday, I am going to visit my grandparents with my family in the morning. In the afternoon, my sister and I are going to help our mother to clean the floor. On Sunday, I am going to play on the computer. In the afternoon, my friends and I are going to play football.

Error analysis:
error_sentence: My next weekend is very interesting.
correct_sentence: My next weekend is going to be very interesting.
correction: going to be
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: According to the grammatical requirements of the prompt, the original sentence lacks a future tense expression. Following the 'be going to' future tense structure rule, the original present progressive predicate 〈is〉 needs to be changed to the future tense predicate 『is going to be』 to form a complete future tense, correcting the original sentence to conform to the required future tense structure.

error_sentence: on saterday I with my fammily are visiting to grandparent in the moring.
correct_sentence: On Saturday, I am going to visit my grandparents with my family in the morning.
error: on saterday I with my fammily are visiting to grandparent
correction: On Saturday, I am going to visit my grandparents with my family
error_type: Word Order Error
error_severity: 5
error_description: ① Case Error: According to English writing conventions, the first letter of the first word in a sentence must be capitalized, so the lowercase 〈on〉 is changed to the capitalized form 『On』; According to the correct spelling rules for English day names, the misspelled 〈saterday〉 is corrected to 『Saturday』.; ② Word Order Error: According to the normal word order rules for subjects and accompanying adverbials in English grammar, the 'with...' phrase as an adverbial should be placed at the end of the sentence, so the misplaced 〈with my family〉 in 〈I with my fammily are visiting to grandparent〉 is moved to the end, restructuring it as 『I am going to visit my grandparents with my family』.; ③ Verb Tense Error: According to the future tense context required by the prompt, the original sentence's 〈are visiting〉 using the present continuous for future is not the standard expression; the 'be going to' structure should be used to indicate a planned future action, so the present participle 〈visiting〉 is changed to 『am going to visit』 to accurately reflect the future tense.; ④ Preposition Error: According to the usage rules of the English verb 〈visit〉 as a transitive verb, it is directly followed by the object without a preposition, so the redundant 〈to〉 is deleted to ensure the verb phrase conforms to the correct pattern 『visit sb.』.; ⑤ Noun Number Error: According to the prompt's requirements, using the singular form 〈grandparent〉 cannot convey the meaning of multiple grandparents, so the singular noun 〈grandparent〉 is changed to the plural form 『grandparents』 to maintain logical semantic consistency.

error_sentence: on saterday I with my fammily are visiting to grandparent in the moring. in the afternoon , I with my sister are helping momter to clean floor.
correct_sentence: On Saturday, I am going to visit my grandparents with my family in the morning. In the afternoon, my sister and I are going to help our mother to clean the floor.
error: moring. in
correction: morning. In
error_type: Spelling Error
error_severity: 2
error_description: ① Spelling Error: According to English vocabulary spelling rules, 〈moring〉 is misspelled; the correct spelling should be the noun 『morning』 meaning 'early part of the day', so the incorrect spelling 〈moring〉 is corrected to 『morning』.; ② Case Error: According to English writing conventions, the first letter after a period needs to be capitalized; it is detected that 〈in〉 is at the beginning of the sentence but not capitalized, so the lowercase form 〈in〉 is changed to the capitalized form 『In』 to comply with the capitalization rule after punctuation.

error_sentence: in the afternoon , I with my sister are helping momter to clean floor.
correct_sentence: In the afternoon, my sister and I are going to help our mother to clean the floor.
error: I with
error_type: Word Order Error
error_severity: 4
error_description: ① Word Order Error: According to English grammar rules, a compound subject structure requires the form 〈A and B〉; the original phrase 〈I with my sister〉 does not conform to the standard compound structure, so it is modified to the grammatically correct 『my sister and I』 to maintain the standard subject structure.; ② Conjunction Error: According to the standard coordination patterns in English, 〈with〉 indicates accompaniment rather than coordination, so the preposition 〈with〉 is changed to the coordinating conjunction 『and』, making the structure 『my sister and I』 grammatically logical.

error_sentence: in the afternoon , I with my sister are helping momter to clean floor.
correct_sentence: In the afternoon, my sister and I are going to help our mother to clean the floor.
error: are helping momter
correction: and I are going to help our mother
error_type: Verb Tense Error
error_severity: 5
error_description: ① Verb Tense Error: According to English future tense expression rules, 〈are helping〉 is in the present continuous tense, but based on the sentence's meaning, the 〈be going to〉 structure should be used to indicate a pre-planned action, so 〈are helping〉 is modified to 『are going to help』 to accurately express future intent.; ② Pronoun Error: Based on the contextual semantics, the possessive pronoun 『our』 needs to be added to clarify the ownership of the mother, making 『our mother』 conform to the rules for English noun phrase determination.; ③ Spelling Error: According to English vocabulary spelling rules, 〈momter〉 is a misspelling; the correct form should be the noun 『mother』 meaning 'female parent'.

error_sentence: in the afternoon , I with my sister are helping momter to clean floor.
correct_sentence: In the afternoon, my sister and I are going to help our mother to clean the floor.
correction: the
error_type: Determiner Error
error_severity: 2
error_description: Determiner Error: According to the grammatical rules for English noun phrases, the common countable noun 〈floor〉 requires a determiner to specify its reference. Since it refers to a specific floor that needs cleaning here, the definite article 『the』 is added to form 『the floor』, correcting the phrase 〈clean floor〉 to the grammatically correct 『clean the floor』.

error_sentence: on sunday I am playing to computer.
correct_sentence: On Sunday, I am going to play on the computer.
error: on sunday
correction: On Sunday,
error_type: Punctuation Error
error_severity: 3
error_description: ① Case Error: According to English writing conventions, the preposition 〈on〉 is at the beginning of the sentence, so its first letter must be capitalized as 『On』; the day name 〈sunday〉 must be capitalized, so it is corrected to the standard 『Sunday』.; ② Punctuation Error: According to English writing conventions, a time adverbial (like a time phrase or clause) at the beginning of a sentence must be followed by a comma to separate it from the main clause, so a comma 『,』 needs to be added after the time adverbial to ensure structural clarity.

error_sentence: on sunday I am playing to computer.
correct_sentence: On Sunday, I am going to play on the computer.
error: playing to
correction: going to play on the
error_type: Verb Tense Error
error_severity: 4
error_description: ① Verb Tense Error: The 〈be going to〉 structure was not used; 〈am playing〉 is changed to the simple future tense 『am going to play』.; ② Preposition Error: According to English grammar rules, 『play on the computer』 is a fixed phrase, so 『on the』 should be added, modifying it to 『play on the computer』.

error_sentence: in afernoon I with my friends playing football.
correct_sentence: In the afternoon, my friends and I are going to play football.
error: in afernoon I with
correction: In the afternoon,
error_type: Word Order Error
error_severity: 5
error_description: ① Case Error: According to the rule of capitalizing the first letter of an English sentence, the first word 〈in〉 was detected as not capitalized, so it is corrected to the standard 『In』.; ② Determiner Error: According to the standard English expression for time, the fixed phrase 〈in afternoon〉 lacks the necessary definite article; it should be supplemented as 『in the afternoon』, so the incorrect expression is modified to 『in the afternoon』.; ③ Spelling Error: The original word 〈afernoon〉 is misspelled; the correct form should be the noun 『afternoon』 meaning 'the time from noon or lunchtime to evening', so it is corrected to 『afternoon』.; ④ Punctuation Error: According to English writing conventions, the time adverbial 『In the afternoon』 at the beginning of the sentence needs to be separated from the main clause by a comma, so the missing punctuation 『,』 is added.; ⑤ Word Order Error: According to the convention for expressing compound subjects in English, 〈I with my friends〉 does not conform to the standard structure; it should be adjusted to 『my friends and I』, and the preposition 〈with〉 should be changed to the conjunction 『and』, finally correcting it to 『my friends and I』.

error_sentence: in afernoon I with my friends playing football.
correct_sentence: In the afternoon, my friends and I are going to play football.
error: playing
correction: and I are going to play
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: According to the standard expression for English future tense, the present participle 〈playing〉 fails to correctly reflect a planned future action; the complete 'be going to' structure is required. Therefore, the incomplete structure 〈playing〉 is corrected to the grammatically standard future tense expression 『are going to play』 to conform to the simple future.