Trending Drawing Mouths With Fangs : The upper lip can slide up and down along the upper row of teeth, but the teeth themselves are anchored to to deepen your understanding of how to draw an open mouth, you can fill in the back facing side of jaw while remembering to incorporate the curve. Next, sketch an arch above and below the horizontal line, making sure the arches stretch the length of the horizontal line. Drawing Mouths With Fangs - Try drawing along the guide to make these hairs look like a fang.