You certainly may. A base-runner may leave the bag as soon as the pitcher releases the ball.
Yes, You can steal three bases in fast pitch softball. You can not steal first.
No, you cannot steal a base on a strike in baseball.
A runner doesn't get a strike, a batter does.
Absolutely
NO
It's when you strike out tag out or throw out
A strike in softball is when a pitcher pitches a softball to the batter [located in the batter box in front of the catcher] and the batter misses. When it is a strike, it is thrown in a particular area from the batter's armpits to the bottom of their knees.
Slow pitch softball has "closed bases," which means the runners cannot leave their base until the ball reaches the plate. But they can steal then.
Depends on how fast you are..
In softball, the batter can be walked, strikeout, or they can get a hit. Walks are caused by the batter accumulating 4 balls. A ball is a pitch thrown outside of the strike zone. A strike is a pitch thrown inside the strike zone. A batter can get a strike by either swinging and missing the ball, or they can get a strike from not swinging at a strike within the strike zone.
Whenever you would like to take the chance.
If you are talking about baseball/softball, then no, on the 3rd strike called by the umpire, the player/batter is out.