1.   Her weight plummeted.

2.   His weight has plummeted.

3.   His weight plummeted.

4.   His weight was plummeting and he was growing weaker.

5.   Then her weight plummeted to seven pounds less than before she was pregnant, and she developed heart palpitations, insomnia, muscle weakness and protruding eyes.

6.   When several of these people were treated with leptin, they lost their appetites and their weight plummeted.