Everyone can wear a smoky eye. It just takes a little experimentation to find out which shape suits you better.
These are just general guidelines, and you should remember that they will each appear different on different eye shapes. There are also more complicated ways to do smoky eyes. I'm just running you through the basics.
For demo purposes, I'm using black face paint (Snazaroo) and 2 brushes. One synthetic concealer brush to pack on the black, and one dry blending fluff brush (below) for smoking out the black.
For your own looks, you don't need to use black or a facepaint! You can use black kajal, khol, gel liner, pencil or even a powder shadow. Anything that doesn't set too quickly, since you need time to smoke it out.
