frontcourt/backcourt

[chasbo]

A1 has both feet and ball over the half court line and his/her next dribble is behind the back and the ball strikes the half court line and A1 continues the dribble. Backcourt? Also can there ever be a backcourt violation during a throw in? Lastly, A1 passes from the backcourt to A2 who has one foot down in frontcourt and catches the pass with second foot in the air and puts it down in the backcourt. Backcourt?