Writing prompt: Assume today is your sister's birthday. Using the picture and the hint words, write an English composition in the present simple tense (at least 5 sentences long). Writing hints: have got; present; cake; surprise.

Student essay:
Today is my sister bireast. Have got many presents for my sister. And have cake. we want give a surprise

Corrected essay:
Today is my sister's birthday. We have got many presents for my sister. And we have a cake. We want to give her a surprise.

Error analysis:
error_sentence: Today is my sister bireast. Have got many presents for my sister.
correct_sentence: Today is my sister's birthday. We have got many presents for my sister.
error: bireast. Have
correction: 's birthday. We have
error_type: Pronoun Error
error_severity: 5
error_description: ① Noun Possessive Error: According to English grammar rules, the noun phrase 〈my sister〉 needs to be converted to the possessive form 『my sister's』 to correctly express possession; therefore, it is modified to the possessive form to comply with noun possessive usage norms; ② Spelling Error: According to English spelling conventions, 〈bireast〉 is a misspelling of the noun 『birthday』. This word is used in the sentence to mean "birthday", so the misspelled 〈bireast〉 is corrected to the proper form 『birthday』 to ensure accurate semantic expression; ③ Pronoun Error: According to basic English sentence structure, the sentence 〈Have got many presents〉 lacks the necessary subject component. Based on the context, the pronoun 『We』 needs to be added as the subject to form the complete subject-verb-object structure 『We have got many presents』, conforming to English sentence completeness requirements.
error_sentence: And have cake.
correct_sentence: And we have a cake.
error: have
correction: we have a
error_type: Pronoun Error
error_severity: 4
error_description: ① Pronoun Error: According to basic English grammar rules, a complete sentence, other than an imperative, must include a subject. The sentence 〈And have cake〉 lacks a subject component; analyzing the context, the pronoun 『we』 should be added as the subject to form the complete structure 『And we have cake』, conforming to English sentence structure completeness requirements; ② Determiner Error: According to English article usage rules, a singular countable noun like 〈cake〉 requires an indefinite article when used generically. Since it refers to "a cake" rather than a specific one, the indefinite article 『a』 needs to be added, correcting it to 『a cake』, making the noun phrase comply with the grammatical norm that "singular countable nouns must have a determiner".
error_sentence: we want give a surprise
correct_sentence: We want to give her a surprise.
error: we want give
correction: We want to give her
error_type: Nonfinite Verb Form Error
error_severity: 5
error_description: ① Case Error: According to English writing conventions, the first letter of a sentence must be capitalized, so 〈we〉 should be changed to 『We』; ② Nonfinite Verb Form Error: According to English infinitive usage rules, the verb 〈want〉, when used as a transitive verb, must be followed by an infinitive structure with 『to』. The original phrase 〈want give〉 does not meet this grammatical requirement, so it is corrected to 『want to give』 to comply with the standard verb pattern "want + to do"; ③ Pronoun Error: According to English double object structure requirements, the verb 〈give〉, as a ditransitive verb, needs both a direct and an indirect object. The original sentence lacks the indirect object indicating the recipient; by adding the pronoun 『her』 as the indirect object, the complete structure 『give her』 is formed, making the sentence components complete, clarifying the object of the action, and conforming to English double object sentence pattern norms.
error_sentence: we want give a surprise
correct_sentence: We want to give her a surprise.
correction: .
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: According to English punctuation norms, a declarative sentence must end with a period as a terminal punctuation mark. The original sentence lacks the necessary end punctuation, so a 『.』 needs to be added for correction, making the sentence 『...give her.』 conform to English written language punctuation requirements and ensuring sentence structural integrity.