How can you draw some thing and give it the illussion that im looking down?

Try putting some objects at your feet, and look down on them as you draw them. Try drawing your feet. Find a friend who has an upper story apartment with a good view of the street below and draw that. The more you practice drawing, the better able you will become at just knowing how things look from differnt angles, but it doesn't hurt to begin by actually changing your view point.