Jean sat down suddenly because her knees seemed to bend under her weight.

His knees seemed to lack the strength they'd had this morning.

"My knee in your balls didn't seem to hit anything."

My knees seem to be a bit shaky tonight.

And her knees seemed to have turned to water.

That knee just seems to be the one to get it.

His knees and elbows seemed always to be in the way.

The knee didn't seem to bother him and he said it was fine.

His knee seemed to get worse in the last three or four weeks, he said.

Then, just when the knee and the shoulder seemed to be getting better, he got the flu.