摔倒后，他躺在沙发上，因为腿疼而轻声呻吟着。

After the fall, he lay on the sofa, ___moaning softly from the pain in his leg.

受伤的球员在地上呻吟着，但几分钟后就能站起来了。

The injured player ___moaned on the ground but was able to stand up after a few minutes.

当护士碰到淤青处时，她忍不住痛得呻吟起来。

She couldn't help but ___moan in pain when the nurse touched the bruised area.