Writing prompt: Sharing

Student essay:
Now it's very important for us to share good ideas with others.
Lastweek our teacher gave us a difficult problem. We can't finish it by ourselves. My classmate didn't finish it too. So we took together and I shared my idea with then. They think it's very important. In the end we finish writing the problem. We feel very happy.
If you share your idea with others you can do something better, and you will feel very happy after that.

Corrected essay:
Now it's very important for us to share good ideas with others.
Last week our teacher gave us a difficult problem. We couldn't finish it by ourselves. My classmate didn't finish it either. So we talked together and I shared my idea with them. They thought it was very important. In the end we finished solving the problem. We felt very happy.
If you share your idea with others you can do something better, and you will feel very happy after that.

Error analysis:
error_sentence: Lastweek our teacher gave us a difficult problem.
correct_sentence: Last week our teacher gave us a difficult problem.
error: Lastweek
correction: Last week
error_type: Space Error
error_severity: 1
error_description: Space Error: According to English writing conventions, words must be separated by spaces. In this sentence, 〈Last〉 and 〈week〉 are two separate words and need to be separated by a space, therefore 〈Lastweek〉 is changed to 『Last week』 to conform to the convention.

error_sentence: We can't finish it by ourselves.
correct_sentence: We couldn't finish it by ourselves.
error: ca
correction: could
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: Based on the context, the past tense should be used here; the present tense 〈can't〉 in the original sentence should be changed to the past tense 『couldn't』.

error_sentence: My classmate didn't finish it too.
correct_sentence: My classmate didn't finish it either.
error: too
correction: either
error_type: Adverb Error
error_severity: 3
error_description: Adverb Error: According to English grammar rules, the adverb 〈too〉 is usually used in affirmative sentences, while in negative sentences, 『either』 should be used to express a negative additive relationship, so 〈too〉 needs to be changed to 『either』 to comply with grammar rules.

error_sentence: So we took together
correct_sentence: So we talked together
error: took
correction: talked
error_type: Verb Choice Error
error_severity: 3
error_description: Verb Choice Error: The verb 〈took〉 means 'to take away', which does not fit the communicative action described in the context; 『talked』 should be used to express the action of 'talking', therefore 〈took〉 is changed to 『talked』 to fit the semantic logic.

error_sentence: and I shared my idea with then.
correct_sentence: and I shared my idea with them.
error: then
correction: them
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to the meaning of the sentence, it is clear that 'them' is intended here, so 〈then〉 is a misspelling of 『them』; 〈then〉 needs to be changed to 『them』 to make the sentence coherent.

error_sentence: They think it's very important.
correct_sentence: They thought it was very important.
error: think it's
correction: thought it was
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: The entire text uses past tense narration, therefore the present tense 〈think it's〉 is changed to the past tense 『thought it was』 to maintain tense consistency.

error_sentence: In the end we finish writing the problem.
correct_sentence: In the end we finished solving the problem.
error: finish writing
correction: finished solving
error_type: Verb Choice Error
error_severity: 4
error_description: ① Verb Tense Error: The entire text uses past tense narration, therefore 〈finish〉 is changed to 『finished』 to maintain tense consistency; ② Verb Choice Error: 〈writing〉 does not match with a math problem; 『solving』 should be used to accurately express 'solving the problem', therefore 〈writing〉 is changed to 『solving』 to clearly express the action's meaning.

error_sentence: We feel very happy.

correct_sentence: We felt very happy.

error: feel
correction: felt
error_type: Verb Tense Error
error_severity: 3
error_description: Verb Tense Error: The entire text uses past tense narration, therefore the present tense 〈feel〉 is changed to the past tense 『felt』 to maintain tense consistency.