Getting on Base

You hit a fair ball that is not caught by a fielder before it touches the ground

You hit a fair ball that touches the ground and is caught by a fielder whose throw fails to beat you to a base

The umpire calls four pitches out of the strike zone during your at-bat

A pitch in the strike zone hits you without first touching your bat

The catcher obstructs your swing

You hit a fair ball beyond the playing field (HR)

You hit a fair, catchable ball, but the fielder drops the ball, throws it away, and so on

A third strike skips past the catcher and you beat the throw to first