I didn't know the man at all的同义句

I didn't know the man at all的同义句
I didn't know the man at all的同义句

I didn't know the man at all的同义句
I knew nothing about the man,用过去时

I know nothing about the man.

i know nothing about the man

I was not acquainted with the man at all/
I hadn't known of him at that time/by then.