some excercises drawing pears

 I felt it was time to do some excercise in drawing.
At the moment it is fall in Holland so a lot of pears are available.
I wanted to explore the form and different light sources and tones and methods to create the rounded form of the pears.
Not an easy subject I discovered.
But I like to start drawing and painting flowers and fruits so I feel that I have to start at the beginning and do a lot of excercises before I will choose an  more complex subject.