My knees were shaking so hard, I couldn't stand still.

My knees were shaking, but I got up and walked out.

Her knees were shaking despite the fact that she felt better.

His knees were shaking, but he tried not to show it.

Her knees shook a little, but she walked good, anyway.

He was standing straight up, even though his knees were shaking with the fear of it.

I'll join that body of men when their knees shake every time they set eyes on me.

But her knees were still shaking; she felt unable to move.

So it will be harder to see whether the president's knees are shaking.

She came slowly back to the wagon, her knees shaking.