Writing prompt: Written Expression.
Following the sequence of pictures below, write a passage titled 'How to make a banana milk shake?'.
How to make a banana milk shake?
Do you like a banana milk shake? And do you know how to make it? If you don't know, let me tell you.

Student essay:
First peel the banana. Then cut put the banana. put the banana into the blender, pour the milk into blender, then turn on the blender, fineily drink.

Corrected essay:
First, I peel the banana. Then, I cut the banana. Next, I put the banana into the blender and pour the milk into the blender. Then, I turn on the blender and finally drink.

Error analysis:
error_sentence: First peel the banana.
correct_sentence: First, I peel the banana.
correction: , I
error_type: Sentence Structure Error
error_severity: 3
error_description: ① Punctuation Error: According to English writing conventions, when a sentence begins with the step adverb 〈First〉, a comma should follow to separate the adverbial phrase; therefore, the punctuation mark 『,』 is added to change 〈First〉 to 『First,』 to comply with English punctuation rules; ② Sentence Structure Error: The original sentence 〈First peel the banana.〉 lacks a subject, resulting in a sentence structure error; the performer of the action needs to be specified, so the first-person singular pronoun 『I』 is added to supply the missing subject, making the sentence structure complete.

error_sentence: Then cut put the banana.
correct_sentence: Then, I cut the banana.
error: cut put
correction: , I cut
error_type: Sentence Structure Error
error_severity: 4
error_description: ① Punctuation Error: According to the writing conventions for English adverbial conjunctions, the step adverb 〈Then〉 at the beginning of a sentence should be followed by a comma; therefore, it is changed to 『Then,』 to conform to standard sentence structure; ② Sentence Structure Error: The original sentence 〈Then cut put the banana.〉 lacks a subject, resulting in a sentence structure error. According to basic English sentence structure requirements, a declarative sentence needs a clear subject; therefore, the first-person pronoun 『I』 is added to ensure sentence completeness; ③ Word Redundancy Error: According to the principle of conciseness in English verb phrases, 〈put〉 is a redundant element in this context, as the action of "putting the banana" is mentioned later; therefore, this word is deleted to align with English expression habits.

error_sentence: Then cut put the banana. put the banana into the blender, pour the milk into blender, then turn on the blender, fineily drink.
correct_sentence: Next, I put the banana into the blender and pour the milk into the blender.
correction: Next, I
error_type: Sentence Structure Error
error_severity: 4
error_description: ① Adverb Error: According to the principle of English discourse coherence, since multiple consecutive actions are being described here, the adverb 『Next』 is added to enhance the logical connection between steps; ② Punctuation Error: According to English writing conventions, a connecting adverb at the beginning of a sentence (such as 『Next』) should be followed by a comma to separate the adverbial phrase; therefore, it is corrected to 『Next, 』 to ensure the sentence structure conforms to standard punctuation rules; ③ Sentence Structure Error: The original phrase 〈put the banana into the blender〉 lacks a subject, resulting in a sentence structure error; the description of steps requires a clear performer of the action, so the first-person pronoun 『I』 is added as the subject, making the implied subject explicit to conform to complete syntactic structure.

error_sentence: put the banana into the blender, pour the milk into blender, then turn on the blender, fineily drink.
correct_sentence: Next, I put the banana into the blender and pour the milk into the blender.
error: ,
correction: and
error_type: Conjunction Error
error_severity: 3
error_description: ① Conjunction Error: According to English grammar rules, a conjunction is needed to connect the two parallel verbs 〈put〉 and 〈pour〉. To avoid a comma splice error, the coordinating conjunction 『and』 is added before the second verb, making the compound sentence structure complete and standard, changing it to 『put and pour』; ② Punctuation Error: Since 『and』 connects two verb phrases, it does not require a preceding comma 〈,〉; therefore, the comma is deleted and replaced with 『and』.

error_sentence: put the banana into the blender, pour the milk into blender, then turn on the blender, fineily drink.
correct_sentence: Next, I put the banana into the blender and pour the milk into the blender. Then, I turn on the blender and finally drink.
error: blender, then
correction: the blender. Then, I
error_type: Pronoun Error
error_severity: 3
error_description: ① Determiner Error: According to English grammar rules, the countable noun 〈blender〉 requires the definite article 『the』 for specific reference, making the sentence grammatically correct; ② Punctuation Error: According to English grammar rules, the preceding sentence 〈Next, I put the banana into the blender and pour the milk into the blender〉 is a complete sentence and needs to be separated from other independent clauses by a period; ③ Case Error: Since 〈then〉 starts a new sentence after being separated from the previous one, its first letter needs to be capitalized, changing it to 『Then』; ④ Punctuation Error: According to English writing conventions, when a sentence begins with the step adverb 〈Then〉, a comma should follow to separate the adverbial phrase; therefore, the punctuation mark 『,』 is added to change 〈Then〉 to 『Then,』 to comply with English punctuation rules; ⑤ Pronoun Error: Based on the context, the second clause needs the subject 〈I〉 added to ensure the sentence structure is complete.

error_sentence: put the banana into the blender, pour the milk into blender, then turn on the blender, fineily drink.
correct_sentence: Then, I turn on the blender and finally drink.
error: , fineily
correction: and finally
error_type: Conjunction Error
error_severity: 3
error_description: ① Conjunction Error: According to English rules for parallel structures, the verb phrases 〈turn on〉 and 〈drink〉, representing consecutive actions, need to be connected by a conjunction; ② Punctuation Error: Since "and" connects two parallel verbs, a comma is not needed before it; therefore, 〈, 〉 should be deleted to conform to English expression habits; ③ Spelling Error: 〈fineily〉 does not conform to English adverb spelling rules; the correct form should be 『finally』, indicating the final step of the action.