I don’t think they forgot the appointment in Korean 🇰🇷

Sentence info.

Sentence breakdown:
• "그들이" means "they" – “그들” (they) with the subject marker “이” attached.
• "약속을" is “appointment” or “promise” as the object, with the object marker “을.”
• "잊었을 리" comes from the past-tense verb “잊었다” (forgot) combined with “-을 리.” The structure V-었/ㄹ 리 expresses an expected logical possibility. When paired with “없다” it implies “there’s no way that…” or “it’s unlikely that…”
• "가 없다고" attaches the subject particle “가” to “없다” and the quoting ending “-다고” to introduce the content of the thought.
• "생각해" means “I think.”

Romanized, the sentence is:
"Geudeuri yaksogeul ijeosseul liga eopdago saenggakhae."

Tips to remember:
• Note that “-을 리” is used when you want to suggest that a certain outcome is logically impossible or highly unlikely. When denying it, you combine it with “없다” to mean “there’s no way that…”
• Remember that quotation endings (like “-다고”) are needed when a clause is the content of a thought or speech. In this case, the idea within the quotation is “there is no way they forgot the appointment.”
• Practice combining object markers and particles (like “을” and “가”) to see how they mark different roles in the sentence.

Alternate expressions for “I don’t think they forgot the appointment”:
• "내 생각엔 그들이 약속을 잊었을 리가 없어."
 (Romanized: "Nae saenggaken geudeuri yaksogeul ijeosseul liga eopseo.")
• "나는 그들이 약속을 잊었을 거라고 생각하지 않아."
 (Romanized: "Naneun geudeuri yaksogeul ijeosseul georago saenggakaji ana.")
• "그들이 약속을 잊어버렸을 리 없다고 봐."
 (Romanized: "Geudeuri yaksogeul ijeobeoryeosseul li eopdago bwa.")

Each alternate sentence uses a similar logical construction to express that it’s unlikely or impossible that they forgot the appointment.

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