I'm not sure I understand...

Meaning

Politely expressing confusion.

Examples

• John: So, the deadline is next Friday.
• Alice: And the report needs to be finalized by then.
• John: <b>I'm not sure I understand</b>. Can you explain again?
• Alice: Okay. The report must be completely finished by next Friday. If you don't understand anything else, just ask. I could explain some more if you're still <b>not sure you understand</b>.