Harold swimmed one hundred laps in the pool yesterday.

Answer 1

I'm glad Harold swam all those laps! Good for him.

Answer 2

I don't know what your question is, but "swimmed" is incorrect.

http://www.bing.com/search?q=past+tense+of+verb+%22swim%22&form=EDGNTC&qs=PF&cvid=f905c3083a7e46fd8d38b554da377ee1&pq=past+tense+of+verb+%22swim%22&cc=US&setlang=en-US