Writing prompt: My Free Time

Student essay:
We are busy with studies from Monday to Friday Inschool.With the vacation coming,we have more free time to spend.As for me,i usually take exercise to keep fit,have entertainment to relax myself.When i am at home,i always do chores to help my parents.Reading is also very neccsery for me,it is very important to open our eyes.
This all what i do at weekend.I think i can keep the balance of study and entertainment

Corrected essay:
We are busy with studies from Monday to Friday in school. With the vacation coming, we have more free time to spend. As for me, I usually take exercise to keep fit and find entertainment to relax. When I am at home, I always do chores to help my parents. Reading is also very necessary for me. It is very important to open our eyes. This is all that I do at the weekend. I think I can keep a balance between study and entertainment.

Error analysis:
error_sentence: We are busy with studies from Monday to Friday Inschool.
correct_sentence: We are busy with studies from Monday to Friday in school.
error: Inschool
correction: in school
error_type: Space Error
error_severity: 2
error_description: ① Case Error: 〈In〉 is not a proper noun and is not at the beginning of a sentence, so its first letter should be lowercase; therefore, 〈In〉 is changed to 『in』; ② Space Error: According to English writing conventions, words must be separated by spaces; therefore, 〈Inschool〉 is changed to 『in school』 to conform to the convention.
error_sentence: As for me,i usually take exercise to keep fit,have entertainment to relax myself.
correct_sentence: As for me, I usually take exercise to keep fit and find entertainment to relax.
error: i
correction: I
error_type: Case Error
error_severity: 1
error_description: Case Error: According to English writing conventions, 『I』 as a first-person pronoun must always be capitalized in a sentence, regardless of whether it is at the beginning or in the middle; therefore, 〈i〉 needs to be changed to 『I』 to conform to the convention.
error_sentence: As for me,i usually take exercise to keep fit,have entertainment to relax myself.
correct_sentence: As for me, I usually take exercise to keep fit and find entertainment to relax.
error: ,have
correction: and find
error_type: Conjunction Error
error_severity: 4
error_description: ① Conjunction Error: The two parallel actions 〈take exercise〉 and 〈have entertainment〉 need to be connected by a conjunction; therefore, 〈,〉 is changed to 『and』 to make the meaning coherent; ② Verb Choice Error: 〈have entertainment〉 is semantically incomplete; the intention here is to express "finding entertainment activities," so 〈have〉 is changed to 『find』 to clarify the purpose of the action.
error_sentence: As for me,i usually take exercise to keep fit,have entertainment to relax myself.
correct_sentence: As for me, I usually take exercise to keep fit and find entertainment to relax.
error: myself
error_type: Word Redundancy Error
error_severity: 3
error_description: Word Redundancy: The verb 〈relax〉 itself already includes the meaning of relaxing oneself; 〈myself〉 is a redundant component here, so 〈myself〉 is deleted to standardize the sentence structure.
error_sentence: When i am at home,i always do chores to help my parents.
correct_sentence: When I am at home, I always do chores to help my parents.
error: i
correction: I
error_type: Case Error
error_severity: 1
error_description: Case Error: According to English writing conventions, 『I』 as a first-person pronoun must always be capitalized in a sentence, regardless of whether it is at the beginning or in the middle; therefore, 〈i〉 needs to be changed to 『I』 to conform to the convention.
error_sentence: When i am at home,i always do chores to help my parents.
correct_sentence: When I am at home, I always do chores to help my parents.
error: i
correction: I
error_type: Case Error
error_severity: 1
error_description: Case Error: According to English writing conventions, 『I』 as a first-person pronoun must always be capitalized in a sentence, regardless of whether it is at the beginning or in the middle; therefore, 〈i〉 needs to be changed to 『I』 to conform to the convention.
error_sentence: Reading is also very neccsery for me,it is very important to open our eyes.

correct_sentence: Reading is also very necessary for me.
error: neccsery
correction: necessary
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to the sentence meaning, the intention here is to express "necessary"; therefore, 〈neccsery〉 is a misspelling of 『necessary』, and 〈neccsery〉 needs to be changed to 『necessary』 to make the sentence meaning clear.
error_sentence: Reading is also very neccsery for me,it is very important to open our eyes.

correct_sentence: Reading is also very necessary for me. It is very important to open our eyes.
error: ,it
correction: . It
error_type: Punctuation Error
error_severity: 2
error_description: ① Punctuation Error: 〈Reading is also very neccsery for me〉 and 〈it is very important to open our eyes〉 contain independent subject-verb structures and can be independent sentences; therefore, 〈,〉 is changed to 『.』 and 〈it〉 is changed to 『It』; ② Space Error: According to English writing conventions, the end-of-sentence punctuation mark should be followed by a space before the first word of the next sentence; therefore, 〈,it〉 is changed to 『. It』 to conform to the convention.
error_sentence: Reading is also very neccsery for me,it is very important to open our eyes.
 This all what i do at weekend.
correct_sentence: This is all that I do at the weekend.
error: 
This all what i
correction: This is all that I
error_type: Sentence Structure Error
error_severity: 3
error_description: Sentence Structure Error: The original sentence is logically chaotic and semantically unclear; considering the context, it is understood that the intended meaning is "this is all that I do at the weekend," so 〈This all what i〉 is changed to 『This is all that I』 to make the meaning coherent and conform to grammatical rules.
error_sentence: This all what i do at weekend.
correct_sentence: This is all that I do at the weekend.
correction: the
error_type: Determiner Error
error_severity: 2
error_description: Determiner Error: The fixed expression is 『at the weekend』; therefore, 『the』 is added before 〈weekend〉 to conform to idiomatic usage.
error_sentence: I think i can keep the balance of study and entertainment
correct_sentence: I think I can keep a balance between study and entertainment.
error: i
correction: I
error_type: Case Error
error_severity: 1
error_description: Case Error: According to English writing conventions, 『I』 as a first-person pronoun must always be capitalized in a sentence, regardless of whether it is at the beginning or in the middle; therefore, 〈i〉 needs to be changed to 『I』 to conform to the convention.
error_sentence: I think i can keep the balance of study and entertainment
correct_sentence: I think I can keep a balance between study and entertainment.
error: the balance of
correction: a balance between
error_type: Preposition Error
error_severity: 3
error_description: ① Determiner Error: This indicates a general reference, requiring the indefinite article 『a』; therefore, 〈the〉 is changed to 『a』 to conform to grammatical rules; ② Preposition Error: To express finding a balance between two aspects, 『between』 is needed; therefore, 〈of〉 is changed to 『between』 to correctly convey the sentence meaning.
error_sentence: I think i can keep the balance of study and entertainment
correct_sentence: I think I can keep a balance between study and entertainment.
correction: .
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: The original sentence 『I think&nbsp;I&nbsp;can keep&nbsp;a&nbsp;balance&nbsp;between&nbsp;study and entertainment』 is a declarative sentence and is complete; therefore, a 『.』 is added after 〈entertainment〉 to conform to punctuation conventions.