我不清楚你的意思 英语怎么说？

I don't know what you mean
I don't get/understand what you said
I'm lost
You lost me
I cannot follow you

都差不多

最婉转的说法：I beg your pardon?&I wonder what you said.
最直接的说法：I don't understand what you said.

I wonder what you meant.

I don't understand what you said.

I am not sure what you mean