Writing prompt: The weekend is coming. Classmates, what are you planning to do? Using the given vocabulary and sentence patterns, and referring to the picture, write a short essay of about 60 words about your plans for the weekend.
Writing hints: be going to; do cleaning; visit grandparents; have a good time

Student essay:
Weekends will come, my classmates have more things in this weekend. Charles, my best friend's, he is going to visits his grandparents. He say they are loot time no see. Luang is going to finish homework. Jo is going to help her mother do housework. What a busy weekend!

Corrected essay:
The weekend is coming. My classmates have many things to do this weekend. Charles is my best friend. He is going to visit his grandparents. He says they haven't seen each other for a long time. Luang is going to finish his homework. Jo is going to help her mother do housework. What a busy weekend!

Error analysis:
error_sentence: Weekends will come, my classmates have more things in this weekend.
correct_sentence: The weekend is coming. My classmates have many things to do this weekend.
error: Weekends will come, my
correction: The weekend is coming. My
error_type: Auxiliary Error
error_severity: 5
error_description: ① Noun Number Error: The weekend here is specific, so the plural form should not be used; it requires the structure "determiner + singular countable noun", thus 〈Weekends〉 should be changed to 『The weekend』 to conform to the specific usage of countable nouns in English.; ② Auxiliary Error: In English, "something is coming" is commonly used to indicate "something is about to happen"; the verb here needs to be in the present continuous tense to express the future, which can be seen as a fixed expression. Here, 〈The weekend〉 is equivalent to "something", so the following verb should use the present continuous tense to indicate an upcoming event. Based on the subject, the auxiliary verb "be" in its third-person singular form "is" is needed, thus 〈will come〉 should be changed to 『is coming』 to conform to English expression habits.; ③ Punctuation Error: The sentences 『The weekend is coming』 and 〈my classmates have...〉 should be two independent main clauses, but they are incorrectly connected by a comma; a period should be used to connect the two sentences, thus 〈,〉 should be changed to 『.』.; ④ Case Error: 〈my classmates have...〉 is an independent main clause, and the first letter of the first word should be capitalized, thus 〈my〉 needs to be changed to 『My』 to conform to English syntax rules.

error_sentence: Weekends will come, my classmates have more things in this weekend.
correct_sentence: My classmates have many things to do this weekend.
error: more things in
correction: many things to do
error_type: Sentence Structure Error
error_severity: 5
error_description: ① Determiner Error: 〈more〉 implies comparison "more", but there is no object of comparison in the context. According to the meaning, it refers to "having many things to do on the weekend", so it needs to be changed to 『many』 to modify the plural noun 〈things〉.; ② Sentence Structure Error: According to the meaning, this sentence intends to express "having many things to do on the weekend", but it doesn't reflect "to do", making the sentence structure incomplete. An infinitive 『to do』 needs to be added after 〈things〉 as a post-modifier to conform to English syntax rules.; ③ Word Redundancy Error: 〈this weekend〉 is often placed at the end of the sentence as a time adverbial for the entire sentence and does not require a preposition before it. Therefore, the redundant preposition 〈in〉 should be deleted here to conform to English expression norms.

error_sentence: Charles, my best friend's, he is going to visits his grandparents.
correct_sentence: Charles is my best friend.
error: ,
correction: is
error_type: Sentence Structure Error
error_severity: 3
error_description: Sentence Structure Error: According to the meaning, the intention is to express "Charles is my best friend". Therefore, this sentence lacks a predicate verb, resulting in an incomplete sentence structure. Since the subject is third-person singular, 〈, 〉 needs to be replaced with 『is』 to add the predicate verb and form a complete sentence.

error_sentence: Charles, my best friend's, he is going to visits his grandparents.
correct_sentence: Charles is my best friend. He is going to visit his grandparents.
error: 's, he
correction: . He
error_type: Noun Possessive Error
error_severity: 4
error_description: ① Noun Possessive Error: In the sentence "Charles is my best friend", the noun "friend" does not have a possessive relationship, so the possessive form is not needed. Therefore, 〈friend's〉 should be changed to the singular countable noun form 『friend』.; ② Punctuation Error: The comma after the possessive structure causes a run-on sentence. After correcting the previous part, the thought group is complete. Therefore, 〈he is going to visits his grandparents〉 should be an independent main clause, and a period should be used to separate the two independent main clauses. So, 〈friend's, he〉 should be changed to 『friend. He』 to conform to syntax rules.

error_sentence: Charles, my best friend's, he is going to visits his grandparents.
correct_sentence: He is going to visit his grandparents.
error: visits
correction: visit
error_type: Nonfinite Verb Form Error
error_severity: 3
error_description: Nonfinite Verb Form Error: The structure 〈be going to〉 should be followed by the base form of the verb. Therefore, there is an error in the nonfinite verb form after the auxiliary verb. Thus, the third-person singular form 〈visits〉 should be changed to the base form 『visit』 to conform to English grammar rules.

error_sentence: He say they are loot time no see.
correct_sentence: He says they haven't seen each other for a long time.
error: say they are loot time no see
correction: says they haven't seen each other for a long time
error_type: Sentence Structure Error
error_severity: 5
error_description: ① Subject-Verb Agreement Error: When the third-person singular subject 〈He〉 is used, the predicate verb needs to be the third-person singular form 『says』, not the base form 〈say〉, to conform to English grammar rules.; ② Spelling Error: 『long time no see』 is a Chinglish expression for "haven't seen for a long time". 〈loot time no see〉 contains a spelling error; 〈loot〉 should be changed to 『long』 to conform to English expression norms.; ③ Sentence Structure Error: According to the meaning, the intention is to express "haven't seen each other for a long time". 〈they are loot time no see〉 is the object clause following 〈says〉. Therefore, the clause lacks a predicate verb; "see" needs to be used as the predicate here, and an object should be added after "see". "Haven't seen for a long time" implies a continuous action, requiring the present perfect tense. Also, 『for a long time』 should be placed at the end of the sentence as a time adverbial. Thus, 〈they are loot time no see〉 should be changed to 『haven't seen each other for a long time』 to conform to semantic and syntactic rules.

error_sentence: Luang is going to finish homework.
correct_sentence: Luang is going to finish his homework.
correction: his
error_type: Pronoun Error
error_severity: 2
error_description: Pronoun Error: The uncountable noun 〈homework〉 needs a possessive determiner before it to indicate possession. Therefore, a possessive determiner is missing here. According to the meaning, the pronoun 『his』 needs to be added before it to clarify that it is 〈Luang〉's homework, conforming to semantic and grammatical rules.