It's hard to put numbers on the four scenarios you cited, but if you stick to aperture priority mode, it should handle all of them well. Manage the aperture size according to how much DOF you want, or how fast you want the shutter speed to be, whether you wish to freeze motion, emphasize it, reduce camera shake etc
Does it means to say, smaller aperture f8.0 for a slower shutter speed and larger ones for a faster shutter speed ?
I think I understand, but the thing that I don't understand is the DOF, freezing motion... Mind giving me some examples ?
Btw, really grateful for your tips