Writing prompt: Please Find My Dictionary

Student essay:
Dear Mr. Brown,
Thank you for helping me when I lived in your home during America.I felt fantastic and learned a lot from you and America education.Because of your help,I adapted more quickly in both family and school.But now,I have some trouble in lefting a dictionary in your home.This is my first dictionary which my American English teacher sent to me.It is valued for me.I think it maybe on the bookshelf in the bedroom.Please find it patiently and if you find it you can post it to me.After that,I will pay for the postage.Thank you!
Yours,Li Hua

Corrected essay:
Dear Mr. Brown,
Thank you for helping me when I lived in your home during my stay in America. I felt fantastic and learned a lot from you and American education. Because of your help, I adapted more quickly to both family and school. But now, I have some trouble as I left a dictionary in your home. This is my first dictionary which my American English teacher sent to me. It is valuable for me. I think it may be on the bookshelf in the bedroom. Please find it patiently and if you find it you can post it to me. After that, I will pay for the postage. Thank you!
Yours,
Li Hua

Error analysis:
error_sentence: Dear Mr. Brown,
Thank you for helping me when I lived in your home during America.
correct_sentence: Dear Mr. Brown,
Thank you for helping me when I lived in your home during my stay in America.
correction: my stay in
error_type: Noun Error
error_severity: 2
error_description: Noun Error: According to the context, the meaning here is 'during the stay in America', the original sentence lacks a noun phrase after 〈during〉, so it needs to add 『my stay in』 to clearly indicate the time and place of residence, making the sentence more accurate.

error_sentence: I felt fantastic and learned a lot from you and America education.
correct_sentence: I felt fantastic and learned a lot from you and American education.
error: America
correction: American
error_type: PoS Confusion Error
error_severity: 4
error_description: PoS Confusion Error: According to the context, 〈America〉 is a noun, while an adjective is needed here as an attributive to modify 〈education〉, it should be changed to the adjective 『American』, therefore 〈America〉 needs to be modified to 『American』 to fit the context.

error_sentence: Because of your help,I adapted more quickly in both family and school.
correct_sentence: Because of your help, I adapted more quickly to both family and school.
error: in
correction: to
error_type: Preposition Error
error_severity: 2
error_description: Preposition Error: According to English expression habits, the preposition 〈in〉 does not conform to semantic rules here, to express adaptation, the preposition 『to』 should be used, therefore 〈in〉 needs to be modified to 『to』 to conform to expression habits.

error_sentence: But now,I have some trouble in lefting a dictionary in your home.
correct_sentence: But now, I have some trouble as I left a dictionary in your home.
error: in lefting
correction: as I left
error_type: Conjunction Error
error_severity: 4
error_description: Conjunction Error: According to the context, the meaning here is 'because I left the dictionary at your home', the original sentence lacks the conjunction 『as』 to express the reason, therefore 〈in lefting〉 needs to be modified to 『as I left』 to make the sentence structure complete.

error_sentence: It is valued for me.
correct_sentence: It is valuable for me.
error: valued
correction: valuable
error_type: Adjective Error
error_severity: 2
error_description: Adjective Error: According to the context, the intention here is to express 'valuable', in the original sentence 〈valued〉 expresses a passive meaning and does not conform to idiomatic expression, therefore 〈valued〉 needs to be modified to 『valuable』 to better fit the semantics.

error_sentence: I think it maybe on the bookshelf in the bedroom.
correct_sentence: I think it may be on the bookshelf in the bedroom.
error: maybe
correction: may be
error_type: PoS Confusion Error
error_severity: 4
error_description: PoS Confusion Error: According to the context, 〈maybe〉 is an adverb, here 'modal verb + base form of verb' is needed to express possibility, therefore 〈maybe〉 in the original sentence needs to be modified to 『may be』 to fit the context.

error_sentence: Yours,Li Hua
correct_sentence: Yours,
Li Hua
correction: 

error_type: Format Error
error_severity: 5
error_description: Format Error: According to English writing conventions, the signature part at the end of an English letter needs to be written on a new line, therefore a line break needs to be added between 〈Yours〉 and 〈Li Hua〉 to conform to standard letter writing conventions.