Ball has gone past

In this situation, the natural swing of the racket once the ball has gone past will take the ball into the side wall.
Adjust your stroke to hit into the side wall

A deliberate shot as an attacking or tactical weapon

Position your feet so that a line drawn from toe to toe on either foot is the direction the ball is to be hit.
Alternatively, you can position yourself as you would a drive, but catch the ball later or deeper in the court.
Novice players will find the boast useful as they sometimes find it hard to hit to the front wall directly

The diagrams in this link about angles will be helpful.