Phrases Asking for Clarification

I'm struggling to understand...

C1

Meaning

Expressing difficulty in comprehension.

Example sentences

John: The instructions are quite complicated.

Alice: Let me try to simplify them.

John: Thanks, but I'm struggling to understand even the simplified version.

Alice: Okay, let's break it down step-by-step. Even then, I'm struggling to understand how that last step works.