hey cecill, i like looking at all your work that you have posted. i think your good with your shading. but your linework is not so such. most of the still life have this angular outline. i would recommend work on your quality, use fine strokes just to get the hang of relaxing your hand in motion. also to use a light contour line to get a ghost image of the object. this will help your shading as well. the shading is okay but some of the mid tones are to dark, draw a desert, since that has very little shading. then you will know what im talking about. i would offer some more advice but thats all i can think of at the moment, i hope this helps you out.
"EVERY GOOD PAINTER PAINTS WHAT HE IS" Jackson Pollock
"I am obsessed with the process of creation" Zdzislaw Beksinski