Translation of Penizillin

Luckily it didn't happen to me, my kids really grew up with us all the time. And besides, they are not allowed do that, because they are monitored endlessly. If they don't attend class they could find themselves on the next train going home.
I was born in Lima and for 14 years I have been living near Frankfurt. I am divorced and I have a little girl and an older son from my first marriage. My son is already in kindergarten.
What is the past tense of 'to swim'? So either you say, I was swimming or yesterday I was swimming. Or: I was running yesterday vs. yesterday, I ran. You know the answer? I have no clue.