Writing prompt: My Free Time

Student essay:
Hi! I am Tom. I am strong and tall.I have a best friend, his name is Mike. We have a lot in common,but there are some different.we both like playing basktball,because play baskerball is very interesting.We sometimes play basketball in my free time whit my cousins.And I like cleaning my room.Some people think do chore is so boring,but I think do chores can help us become independent,so I like cleanging my room.But in my free time,I like reading books best.Reading can help us study,it is important for me to learn English.I always read with my mother in my free time.What about you?

Corrected essay:
Hi! I am Tom. I am strong and tall. I have a best friend. His name is Mike. We have a lot in common, but there are some differences. We both like playing basketball, because playing basketball is very interesting. We sometimes play basketball in my free time with my cousins. And I like cleaning my room. Some people think doing chores is so boring, but I think doing chores can help us become independent, so I like cleaning my room. But in my free time, I like reading books best. Reading can help us study, and it is important for me to learn English. I always read with my mother in my free time. What about you?

Error analysis:
error_sentence: I have a best friend, his name is Mike.
correct_sentence: I have a best friend. His name is Mike.
error: , his
correction: . His
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: According to English grammar rules, two independent clauses need to be separated by a period to avoid a run-on sentence; in the original sentence, 〈I have a best friend〉 and 〈his name is Mike〉 are two main clauses, therefore 〈,〉 is changed to 『.』 to comply with grammar.

error_sentence: We have a lot in common,but there are some different.we both like playing basktball,because play baskerball is very interesting.
correct_sentence: We have a lot in common, but there are some differences. We both like playing basketball, because playing basketball is very interesting.
error: different.we
correction: differences. We
error_type: PoS Confusion Error
error_severity: 5
error_description: ① PoS Confusion Error: According to the context, 〈different〉 is an adjective, while a noun is needed here as an object; it should be changed to the noun 『differences』, therefore 〈different〉 needs to be changed to 『differences』 to fit the context. ② Space Error: According to English writing conventions, there needs to be a space between punctuation and a word; in the original sentence, 〈.we〉 lacks a space, therefore 〈.we〉 needs to be changed to 『. We』 to comply with writing conventions.

error_sentence: We have a lot in common,but there are some different.we both like playing basktball,because play baskerball is very interesting.
correct_sentence: We both like playing basketball, because playing basketball is very interesting.
error: basktball
correction: basketball
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to the meaning of the sentence, it is clear that “basketball” is intended here, therefore 〈basktball〉 is a misspelling of 『basketball』; 〈basktball〉 needs to be changed to 『basketball』 to make the sentence coherent.

error_sentence: We have a lot in common,but there are some different.we both like playing basktball,because play baskerball is very interesting.
correct_sentence: We both like playing basketball, because playing basketball is very interesting.
error: play baskerball
correction: playing basketball
error_type: Nonfinite Verb Form Error
error_severity: 5
error_description: ① Nonfinite Verb Form Error: According to English grammar rules, when a verb acts as a subject, the gerund form is required; therefore, in the original sentence, when the verb 〈play〉 acts as the subject, the gerund form 『playing』 is needed to comply with grammatical rules. ② Spelling Error: According to the meaning of the sentence, it is clear that “basketball” is intended here, therefore 〈baskerball〉 is a misspelling of 『basketball』; 〈baskerball〉 needs to be changed to 『basketball』 to make the sentence coherent.

error_sentence: We sometimes play basketball in my free time whit my cousins.
correct_sentence: We sometimes play basketball in my free time with my cousins.
error: whit
correction: with
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to the meaning of the sentence, it is clear that “with” is intended here, therefore 〈whit〉 is a misspelling of 『with』; 〈whit〉 needs to be changed to 『with』 to make the sentence coherent.

error_sentence: Some people think do chore is so boring,but I think do chores can help us become independent,so I like cleanging my room.
correct_sentence: Some people think doing chores is so boring, but I think doing chores can help us become independent, so I like cleaning my room.
error: do chore
correction: doing chores
error_type: Nonfinite Verb Form Error
error_severity: 5
error_description: ① Nonfinite Verb Form Error: According to English grammar rules, when a verb acts as a subject, the gerund form is required; therefore, in the original sentence, when the verb 〈do〉 acts as the subject, the gerund form 『doing』 is needed to comply with grammatical rules. ② Noun Number Error: According to the context, in the original sentence 〈chore〉 should use the plural form 『chores』 to represent a general situation, therefore 〈chore〉 should be changed to 『chores』 to fit the context.

error_sentence: Some people think do chore is so boring,but I think do chores can help us become independent,so I like cleanging my room.
correct_sentence: Some people think doing chores is so boring, but I think doing chores can help us become independent, so I like cleaning my room.
error: do
correction: doing
error_type: Nonfinite Verb Form Error
error_severity: 3
error_description: Nonfinite Verb Form Error: According to English grammar rules, when a verb acts as a subject, the gerund form is required; therefore, in the original sentence, when the verb 〈do〉 acts as the subject, the gerund form 『doing』 is needed to comply with grammatical rules.

error_sentence: Some people think do chore is so boring,but I think do chores can help us become independent,so I like cleanging my room.
correct_sentence: Some people think doing chores is so boring, but I think doing chores can help us become independent, so I like cleaning my room.
error: cleanging
correction: cleaning
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to the meaning of the sentence, it is clear that “cleaning” is intended here, therefore 〈cleanging〉 is a misspelling of 『cleaning』; 〈cleanging〉 needs to be changed to 『cleaning』 to make the sentence coherent.

error_sentence: Reading can help us study,it is important for me to learn English.
correct_sentence: Reading can help us study, and it is important for me to learn English.
correction: and
error_type: Conjunction Error
error_severity: 4
error_description: Conjunction Error: According to English grammar rules, in the original sentence, 〈Reading can help us study〉 and 〈it is important for me〉 as coordinate structures require the addition of 『and』 for connection, therefore the original sentence needs the addition of 『and』 to comply with English grammar rules.