She knew her older sister would be going with someone.

But I knew my sister and had seen that particular look on her face many times before.

I once knew his sister, and I'd like to meet him.

How well had she known her sister in adult life, after all?

He'd never known his sister to phone him up, except at Christmas.

He knew his sister so well and aimed at the heart.

Few questions were asked, and since none of them had ever known my sister, I didn't have to put on any performances.

It must have cost a fortune, but you know your sister.

I met a fellow on the bus who knows your sister.

She knew her sister in ways that I never would.