Phrases Handling Misunderstandings

I'm not sure I follow.

A2

Meaning

I'm having difficulty understanding.

Example sentences

John: So, the next step is to integrate the function.

Alice: I'm not sure I follow. Could you explain that part again?

John: Sure, let's go through it slowly.

Alice: Thanks. I think I understand now, but if not, I'll say I'm not sure I follow. again.