Facial expressions were mandatory in ASL, at least according to my teacher. The best analogy I can think of is of a tonal language, where raised eyebrows, a som

Facial expressions were mandatory in ASL, at least according to my teacher. The best analogy I can think of is of a tonal language, where raised eyebrows, a somewhat astonished look, or a frown with a furrowed brow are the tones.