1.   His knees ached as he knelt there for hours.

2.   My back ached, my knees ached, my head ached.

3.   He was tired after his journey to the river and his knees ached.

4.   And while his knee ached afterward, Morrow said he is still on pace to return after Christmas.

5.   His left knee ached, and though he played through the pain for a month, he eventually was forced onto the disabled list.

6.   His surgically repaired knees must ache.

7.   His knee ached.

8.   However, his right knee also is aching.

9.   My feet hurt, my knees were aching.

10.   Nevertheless, after the first day, knees ached, bums were numbed and walking bow-legged felt unnaturally natural.