How to Say I Don’t Understand

Formal to Casual
• I’m sorry, but I’m not sure that I understand you entirely.
• Would you be so kind as to explain that to me once more?
• I’m sorry to say this, but I’m not following you.
• I’m not certain if I understand you properly
• Please help me by clarifying.
• Sorry, my mind can’t process information that quickly. [joking]
• I am not sure if I understand where you’re going with this.
• I’m probably missing something, here.
• I must read up on the subject.
• I’m not sure what you’re trying to say.
• Can you say that again in layperson’s terms?
• Am I missing something?
• I don’t get it.
• I have no clue what you’re talking about.
• Well, I’m lost.
• What the heck?

Conversation videos:
https://www.youtube.com/channel/UCV0wcNQ0zQPFcDad8wTK_XQ/videos