If you can understand what your ball is doing in flight then you have a good chance of finding the areas in your swing that cause it. Two major principals are considered in ball flight, the swing-path and blade angle of the club at impact. The swing-path is the direction the club is traveling in relation to the target. It is the initial direction of the golf ball’s flight. If the path is along target line, ball will start straight. If the path is inside out the target line or swinging right, the ball will start right. Iif the path is outside in the target line or swinging left, the ball will start left. 

Blade-angle is the position of the clubface at impact. This affects the way the golf ball  spins in flight. If the blade is square or straight to the swing path, the ball will not curve. If the blade is open to the swing path the ball will curve to the right. If the blade is closed to the swing path the ball will curve to the left. 

 In order to better explain these principals, let's assume that a solid shot on the center of the clubface is established. The diagram below will provide an explanation of the nine possible ball flights that can occur.