Writing prompt: My Dream

Student essay:
Dear friends
I am very happy to speak here to you .
My dream is to be a teachr . but many people would be surprise,they think teacher is very hard and the pay is poor. but I have own idea about it. I have had a dream to become a school teacher when I was a child . I think teacher's job is very important and necessary for social and economic development. I like to paly with students. they can make me feel young. and I don't thing teach students is waste of time .but .I think it's a valuable job.
That is all I have to say .thank you

Corrected essay:
Dear friends,
I am very happy to speak here to you.
My dream is to be a teacher, but many people would be surprised. They think being a teacher is very hard and the pay is poor. But I have my own idea about it. I have had a dream to become a school teacher since I was a child. I think a teacher's job is very important and necessary for social and economic development. I like to play with students and they can make me feel young. And I don't think teaching students is a waste of time. I think it's a valuable job.
That is all I have to say. Thank you.

Error analysis:
error_sentence: Dear friends
I am very happy to speak here to you .

correct_sentence: Dear friends,
I am very happy to speak here to you.

correction: ,
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: According to English writing conventions, the salutation 〈Dear friends〉 should be followed by a comma to separate it from the main text, so 『,』 is added to conform to English letter format conventions.
error_sentence: My dream is to be a teachr .
correct_sentence: My dream is to be a teacher, but many people would be surprised.
error: teachr .
correction: teacher,
error_type: Spelling Error
error_severity: 3
error_description: ① Spelling Error: According to English writing conventions, the word 〈teachr〉 is misspelled; the correct form is 『teacher』, meaning 'teacher'; ② Punctuation Error: After “teacher” is a contrasting clause introduced by “but”, so a comma is needed at the end of the sentence to connect the subsequent contrasting clause; therefore, “teachr .” is changed to 『teacher,』.
error_sentence: but many people would be surprise,they think teacher is very hard and the pay is poor.
correct_sentence: My dream is to be a teacher, but many people would be surprised. They think being a teacher is very hard and the pay is poor.
error: surprise,they think
correction: surprised. They think being a
error_type: PoS Confusion Error
error_severity: 3
error_description: ① PoS Confusion Error: 〈surprise〉 can only be a noun or a verb; here it needs to be changed to the past participle form 『surprised』, meaning 'surprised', to modify the subject and describe an emotional state; ② Punctuation Error: “but many people would be surprised” and “They think being a teacher is very hard and the pay is poor” are two independent sentences that need to be separated by a period 『.』 to clarify meaning, so “surprise,they” should be changed to “surprised. They”; ③ Nonfinite Verb Form Error: As a profession, 〈teacher〉 needs to use the gerund structure “being a teacher” to express an abstract concept; ④ Determiner Error: According to English grammar rules, a singular countable noun needs to be preceded by the indefinite article “a” to refer to 'a teacher' in a general sense.
error_sentence: but I have own idea about it.
correct_sentence: But I have my own idea about it.
error: but
correction: But
error_type: Case Error
error_severity: 2
error_description: Case Error: According to English writing conventions, the conjunction 〈but〉 at the beginning of the sentence needs to be capitalized as 『But』 to comply with English writing rules.
error_sentence: but I have own idea about it.
correct_sentence: But I have my own idea about it.
correction: my
error_type: Determiner Error
error_severity: 3
error_description: Determiner Error: According to English writing conventions, a determiner is missing before 〈own idea〉; 『my』 needs to be added to indicate possession and complete the meaning.
error_sentence: I have had a dream to become a school teacher when I was a child .
correct_sentence: I have had a dream to become a school teacher since I was a child.
error: when
correction: since
error_type: Conjunction Error
error_severity: 3
error_description: Conjunction Error: According to English grammar rules, when the present perfect tense 〈have had〉 is used with an adverbial of time, 『since』 should be used to indicate the starting point of a continuous state, not 『when』.
error_sentence: I think teacher's job is very important and necessary for social and economic development.
correct_sentence: I think a teacher's job is very important and necessary for social and economic development.
correction: a
error_type: Determiner Error
error_severity: 3
error_description: Determiner Error: According to English grammar rules, the singular countable noun 〈teacher's job〉 needs to be preceded by the indefinite article 『a』 to indicate a general reference.
error_sentence: I like to paly with students.
correct_sentence: I like to play with students and they can make me feel young.
error: paly
correction: play
error_type: Spelling Error
error_severity: 2
error_description: Spelling Error: According to English writing conventions, the word 〈paly〉 is misspelled; it should be 『play』 to correctly express the meaning 'to play'.
error_sentence: I like to paly with students.
correct_sentence: I like to play with students and they can make me feel young.
error: .
correction: and
error_type: Conjunction Error
error_severity: 3
error_description: ① Punctuation Error: The period 〈.〉 incorrectly separates the logically connected coordinate clauses “I like to play with students” and “they can make me feel young”; it needs to be changed to a comma; ② Conjunction Error: The coordinate clauses “I like to play with students” and “they can make me feel young” need to be connected by a conjunction, so the conjunction 'and' is added between the two sentences.
error_sentence: and I don't thing teach students is waste of time .but
correct_sentence: And I don't think teaching students is a waste of time.
error: and
correction: And
error_type: Case Error
error_severity: 2
error_description: Case Error: According to English grammar rules, the conjunction 〈and〉 at the beginning of the sentence needs to be capitalized as 『And』 to comply with English writing rules.
error_sentence: and I don't thing teach students is waste of time .but
correct_sentence: And I don't think teaching students is a waste of time.
error: thing teach
correction: think teaching
error_type: Nonfinite Verb Form Error
error_severity: 3
error_description: ① Spelling Error: 〈thing〉 means 'matter' or 'object'; here the intended meaning is 'to believe' or 'to opine', so 〈thing〉 should be changed to 『think』; ② Nonfinite Verb Form Error: According to English grammar rules, when the verb 〈teach〉 acts as a subject, it needs to be changed to the gerund form 『teaching』, meaning 'the act of teaching'.
error_sentence: and I don't thing teach students is waste of time .but
correct_sentence: And I don't think teaching students is a waste of time.
correction: a
error_type: Determiner Error
error_severity: 3
error_description: Determiner Error: According to English grammar rules, the determiner 『a』 needs to be added before 〈waste of time〉 to conform to English expression habits, meaning 'a waste of time'.
error_sentence: and I don't thing teach students is waste of time .but .I think it's a valuable job.

correct_sentence: And I don't think teaching students is a waste of time. I think it's a valuable job.

error: .but .I
correction: . I
error_type: Punctuation Error
error_severity: 2
error_description: ① Punctuation Error: According to English writing conventions, there should be no space between the word and the period at the end of a declarative sentence, so 〈time .〉 is changed to 『time.』; ② Word Redundancy Error: It was previously mentioned “I don't think teaching students is a waste of time,” and later “I think it's a very valuable job”; these two form a clear contrast and do not require the conjunction “but”, so the redundant word “but” and the period following it are deleted.
error_sentence: That is all I have to say .thank you
correct_sentence: That is all I have to say. Thank you.
error: .thank you
correction: . Thank you.
error_type: Punctuation Error
error_severity: 3
error_description: ① Punctuation Error: According to English writing conventions, there should be no space between a word and a punctuation mark, so “say .” is changed to “say.”; ② Case Error: According to English writing conventions, 〈thank〉 at the beginning of a sentence needs to be capitalized to comply with English writing rules.