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 banana , second , cut up banana, whenput banana into the blender. Pour milk into the banana, ture on the switch. Ok, Let's drink some . Wow it's so yum.

Corrected essay:
First, I peel the banana. Second, I cut up the banana and then put the banana into the blender. I pour milk into the blender and turn on the switch. Ok, let's drink some. Wow, it's so yummy.

Error analysis:
error_sentence: First , peel banana , second , cut up banana, whenput banana into the blender.
correct_sentence: First, I peel the banana. Second, I cut up the banana and then put the banana into the blender.
error: peel banana , second ,
correction: I peel the banana. Second, I
error_type: Pronoun Error
error_severity: 5
error_description: ① Pronoun Error: 〈peel banana〉 lacks a pronoun as the subject; based on the context, add the subject pronoun 『I』 to form a complete subject-verb-object structure; ② Determiner Error: The countable noun 〈banana〉 needs the specific determiner 『the』 (referring to the specific object of the action); according to English grammar rules, a singular countable noun used independently in a sentence must have a determiner (like an article/possessive/demonstrative); ③ Punctuation Error: The first comma 〈,〉 in the sentence is used incorrectly; it should be changed to a period 『.』 to separate two independent sentences; ④ Space Error: There should not be a space after 〈banana 〉; remove the space to make it 『banana』; ⑤ Case Error: Based on the preceding and following sentences, 〈second〉 is at the beginning of the second sentence, so its first letter needs to be capitalized, corrected to 『Second』; ⑥ Space Error: There is an extra space in 〈second ,〉; it should be deleted to the correct format 『Second,』; ⑦ Pronoun Error: The second phrase 〈cut up〉 lacks a pronoun as the subject; based on the context, add the subject pronoun 『I』 to form a complete subject-verb-object structure.

error_sentence: First , peel banana , second , cut up banana, whenput banana into the blender.
correct_sentence: Second, I cut up the banana and then put the banana into the blender.
error: banana, whenput
correction: the banana and then put the
error_type: Conjunction Error
error_severity: 5
error_description: ① Determiner Error: The countable noun 〈banana〉 needs the specific determiner 『the』 (referring to the specific object of the action); according to English grammar rules, a singular countable noun used independently in a sentence must have a determiner (like an article/possessive/demonstrative); ② Conjunction Error: The original sentence lacks the conjunction 『and』; to correctly express the sequence of actions, the logical conjunction 『and』 should be used to show the sequential relationship between the two steps; ③ Punctuation Error: According to English grammar rules, when using 『and』 to connect two consecutive actions, a comma is not needed before 『and』, so the comma should be deleted; ④ Spelling Error: Based on the sentence's meaning, 〈whenput〉 is an incorrect combination of 'when' and 'put'; here 'when' is a spelling error and should be changed to 'then' to be used with the preceding 『and』; ⑤ Space Error: As the original sentence shows, after correction, 〈whenput〉 becomes two words, 'then' and 'put', so a space is needed between them when used in the sentence; the correct form should be 『then put』; ⑥ Determiner Error: The noun 〈banana〉 lacks the necessary determiner 『the』 to specify the object; therefore, 『the』 needs to be added.

error_sentence: Pour milk into the banana, ture on the switch.
correct_sentence: I pour milk into the blender and turn on the switch.
error: Pour
correction: I pour
error_type: Pronoun Error
error_severity: 3
error_description: ① Pronoun Error: The original sentence 〈Pour milk into the banana, ture on the switch.〉 has the problem of a missing subject pronoun. The verb 〈pour〉 lacks the subject pronoun 『I』, violating the basic subject-verb-object structure of English declarative sentences; therefore, adding the pronoun 『I』 clarifies the agent of the action and achieves consistency in tense (simple present) and sentence structure (declarative mood) between the clauses; ② Case Error: After adding the subject, according to English writing conventions, the originally capitalized 〈Pour〉 needs to be changed to lowercase 『pour』.

error_sentence: Pour milk into the banana, ture on the switch.
correct_sentence: I pour milk into the blender and turn on the switch.
error: banana, ture
correction: blender and turn
error_type: Conjunction Error
error_severity: 5
error_description: ① Noun Error: The word 〈banana〉 in the original sentence presents a semantic contradiction; a banana, being a fruit, cannot accommodate the action of "pouring milk into". It should be replaced with a kitchen appliance that functions as a container, 『blender』, representing a misuse of an appliance noun; ② Conjunction Error: From the original sentence 〈Pour milk into the banana, ture on the switch.〉, it is clear that two consecutive actions are being described; according to English grammar rules, 『and』 is needed to connect the two predicate verbs, so 『and』 must be added here; ③ Punctuation Error: According to English grammar rules, when using 『and』 to connect two consecutive actions, a comma is not needed before 『and』, so the comma should be deleted and corrected to 『blender and turn』; ④ Spelling Error: 〈ture〉 does not conform to English spelling rules; the correct spelling should be 'turn', so 〈ture〉 should be changed to 『turn』.

error_sentence: Ok, Let's drink some .
correct_sentence: Ok, let's drink some.
error: Let
correction: let
error_type: Case Error
error_severity: 2
error_description: Case Error: 〈Let's〉 is located mid-sentence, and its initial capital letter does not conform to English writing conventions. In English sentence structure, only the first word of a sentence or proper nouns require capitalization. Here, 〈Let's〉 begins a clause after a comma but is still an intermediate component of the same compound sentence, so it should retain its lowercase form 『let's』.

error_sentence: Wow it's so yum.
correct_sentence: Wow, it's so yummy.
correction: ,
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: In English written expression, the interjection 〈Wow〉, as an independent emotional component, must be separated from the main clause by a comma; therefore, a comma is added to form “Wow, it's so yummy”.

error_sentence: Wow it's so yum.
correct_sentence: Wow, it's so yummy.
error: yum
correction: yummy
error_type: Adjective Error
error_severity: 3
error_description: Adjective Error: 〈yum〉 is a colloquial interjection expressing appreciation and cannot function directly as an adjective in the grammatical structure. The current sentence pattern 〈it's so〉 requires an adjective as a predicative, and 『yummy』 is the specific adjective form used to describe food as delicious.