1–3: particle mistakes
First, match 은/는, 이/가, and 을/를 to the noun’s role rather than to one English translation. Second, remember that paired particles change after a final consonant. Third, distinguish destinations marked by 에 from action locations commonly marked by 에서.
사과 ends in a vowel, so use 를.
The action happens at school.
4–5: translating too literally
Korean often omits information that is clear from context, especially subjects and pronouns. Learners also overuse 당신 for English ‘you’; in everyday Korean, a name, title, relationship term, or no pronoun at all is often more natural.
Context can make ‘you’ unnecessary.
6–7: speech level and overconfidence
Do not mix very formal endings, polite -요 speech, and casual 반말 at random. And do not force a single correction when context allows more than one meaning. A good learner habit is to ask what you mean before asking which particle or ending is ‘the answer.’
Both are possible; the particle changes the meaning.
A seven-point self-check before you correct a sentence
Check these in order: the noun’s role, batchim form, destination versus action location, repeated pronouns, literal English structure, speech-level consistency, and whether context permits more than one answer. This order prevents a surface-level particle change from hiding a larger meaning problem.
A correction tool should also be allowed to say ‘not enough context.’ No change is safer than a confident but false correction. That is why HANGEASY intentionally leaves unsupported or ambiguous patterns unmatched.
에서 marks the action location; 를 marks the photographed person.
은 sets the time frame while 가 identifies who will act.
Practice with a contrast pair
When two forms are both possible, write one sentence for each meaning instead of memorizing one as ‘wrong.’ Contrast pairs train you to connect grammar to intention, which is more useful than editing by appearance alone.