Writing prompt: When I Have a Different Opinion

Student essay:
If you and your classmate have different opinion,what will you do?I often respect my classmate's opinion and find why our opinion are different.If I was wrong I would chenge my opinion until it was right.If my opinion was right I must do something to change everyone's opinion.
Why I want to do this.Because I know the right thing is only one.Though there have no pure water and no pure milk,we needed do something to make it pure.
I think one day the world will be better because of me.
So what is your opinion.

Corrected essay:
If you and your classmate have different opinions, what will you do? I often respect my classmate's opinion and find out why our opinions are different. If I am wrong, I will change my opinion until it is right. If my opinion is right, I must do something to change everyone's opinion.
Why do I want to do this? Because I know the right thing is only one. Though there is no pure water and no pure milk, we need to do something to make it pure.
I think one day the world will be better because of me.
So what is your opinion?

Error analysis:
error_sentence: If you and your classmate have different opinion,what will you do?I often respect my classmate's opinion and find why our opinion are different.
correct_sentence: If you and your classmate have different opinions, what will you do?
error: opinion
correction: opinions
error_type: Noun Number Error
error_severity: 3
error_description: Noun Number Error: In English, “opinion” is a countable noun and should be in plural form when referring to multiple viewpoints. In the original sentence, “different opinion,” “different” implies multiple viewpoints, so 〈opinion〉 should be changed to the plural form 『opinions』.
error_sentence: If you and your classmate have different opinion,what will you do?I often respect my classmate's opinion and find why our opinion are different.
correct_sentence: If you and your classmate have different opinions, what will you do? I often respect my classmate's opinion and find out why our opinions are different.
error: do?I
correction: do? I
error_type: Space Error
error_severity: 1
error_description: Space Error: According to English writing conventions, a space is required after the punctuation mark 〈?〉 at the end of an interrogative sentence. In the original sentence 〈do?I〉, there is no space after the question mark, so 〈do?I〉 is modified to 『do? I』 to comply with English writing conventions.
error_sentence: If you and your classmate have different opinion,what will you do?I often respect my classmate's opinion and find why our opinion are different.
correct_sentence: I often respect my classmate's opinion and find out why our opinions are different.
correction: out
error_type: Verb Choice Error
error_severity: 3
error_description: Verb Choice Error: According to English expression habits, the phrase 〈find why〉 does not conform to standard English expression. Adding 『out』 after the verb 〈find〉 forms the fixed phrase 『find out』, meaning “to ascertain the reason.” In the original sentence, 〈find why〉 is semantically incomplete; adding 『out』 makes the sentence's meaning clearer and more accurate.
error_sentence: If you and your classmate have different opinion,what will you do?I often respect my classmate's opinion and find why our opinion are different.
correct_sentence: I often respect my classmate's opinion and find out why our opinions are different.
error: opinion
correction: opinions
error_type: Noun Number Error
error_severity: 3
error_description: Noun Number Error: In English, countable nouns must agree in number with the predicate verb. In the original sentence “our opinion are different,” the predicate verb “are” is plural, while “opinion” is singular, indicating a noun number error. 〈opinion〉 should be changed to the plural form 『opinions』 so that the sentence “our opinions are different” conforms to grammatical rules.
error_sentence: If I was wrong I would chenge my opinion until it was right.
correct_sentence: If I am wrong, I will change my opinion until it is right.
error: was wrong I would chenge
correction: am wrong, I will change
error_type: Verb Tense Error
error_severity: 3
error_description: ① Verb Tense Error: According to English grammar rules, when a hypothetical conditional sentence describes a general fact or possibility, 〈was〉 should be changed to the present tense 『am』 to indicate the current state; according to the context, to express a future decision, 『will』 should be used, so 〈would〉 is changed to 『will』; ② Spelling Error: According to the sentence's meaning, the intention here is to express “change,” so 〈chenge〉 is a misspelling of 『change』; 〈chenge〉 needs to be corrected to 『change』.
error_sentence: If I was wrong I would chenge my opinion until it was right.
correct_sentence: If I am wrong, I will change my opinion until it is right.
error: was
correction: is
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: In the original sentence, the 〈was〉 in the adverbial clause of time has a verb tense error. The sentence describes a general fact rather than a past event; to maintain tense consistency between the main and subordinate clauses, 〈was〉 should be changed to the present tense 『is』.
error_sentence: If my opinion was right I must do something to change everyone's opinion.

correct_sentence: If my opinion is right, I must do something to change everyone's opinion.

error: was right
correction: is right,
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: According to English grammar rules, the present tense should be used when a hypothetical conditional sentence describes a current situation. The original sentence used the past tense 〈was right〉 in a hypothetical conditional clause indicating a currently correct opinion, which is a verb tense error. 〈was right〉 needs to be modified to 『is right』 to conform to the tense rules for real conditional sentences.
error_sentence: Why I want to do this.
correct_sentence: Why do I want to do this?
correction: do
error_type: Auxiliary Error
error_severity: 2
error_description: Auxiliary Error: According to the grammatical rules for English special interrogative sentences, a special interrogative sentence requires the structure “question word + auxiliary verb + subject + base form of the verb + other.” The original sentence 〈Why I want to do this.〉 lacks an auxiliary verb, which is an auxiliary error. The auxiliary verb 『do』 should be added before the subject 〈I〉.
error_sentence: Why I want to do this.
correct_sentence: Why do I want to do this?
error: .
correction: ?
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: According to English punctuation rules, the end of an interrogative sentence should use a question mark 『?』 instead of a period 〈.〉. Therefore, the 〈.〉 at the end of the original sentence is changed to 『?』 to comply with English punctuation rules.
error_sentence: Though there have no pure water and no pure milk,we needed do something to make it pure.

correct_sentence: Though there is no pure water and no pure milk, we need to do something to make it pure.

error: have
correction: is
error_type: Verb Choice Error
error_severity: 3
error_description: Verb Choice Error: According to English grammar rules, the existential sentence structure requires “there be” to express the meaning of “have” or “exist.” In the original sentence, 〈there have〉 does not conform to this grammatical rule, which is a verb choice error. Since “pure water” is an uncountable noun, 〈have〉 should be changed to 『is』, forming 『there is』, to comply with the grammatical rules and semantic expression of the “there be” sentence pattern.
error_sentence: Though there have no pure water and no pure milk,we needed do something to make it pure.

correct_sentence: Though there is no pure water and no pure milk, we need to do something to make it pure.

error: needed
correction: need to
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: According to English tense rules, the sentence describes an action that needs to be taken currently and should use the simple present tense. In the original sentence, 〈needed〉 is in the past tense, which cannot accurately express the current need, constituting a verb tense error. 〈needed〉 needs to be modified to 『need to』 to make the sentence conform to the context and tense requirements.
error_sentence: So what is your opinion.
correct_sentence: So what is your opinion?
error: .
correction: ?
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: According to English punctuation rules, the end of an interrogative sentence should use a question mark 『?』 instead of a period 〈.〉. The original sentence 〈So what is your opinion.〉 is an interrogative sentence, and using a period at the end does not conform to the rules; 〈.〉 needs to be changed to 『?』 to comply with English punctuation standards.