Step 6: Draw a long curved line below for the bottom edge of the dinosaur's open mouth. The shape of this line should be similar to a wavy, tilted letter V.
Step 7: Now draw a series of short, triangle like shapes along the line for the bottom row of teeth. You can make the teeth on your Tyrannosaurus rex drawing bigger if you'd like.
Step 8: Draw a couple of curved lines between the teeth for the T. rex's tongue. You can skip this step if you don't have enough room between the teeth.
Step 9: Under the mouth, draw a long line that curves to the left for the jaw. The line should curve up toward the mouth to emphasize the dinosaur's jaw muscles.
Step 10: To the left of the T. rex's eye, draw a curved line for the back of the head and top edge of the neck. Remember to sketch lightly at first, and when you get the shape right, darken the lines. Under the mouth, draw a wavy line that slopes to the left for the bottom edge of the neck.