Some noun vs Verb
Some look-alike signs depend on movement.
Not all ASL nouns double tap. Compare certain related noun/verb pairs, no extra plural movement, and plural repetition through space so repeated signs do not get confusing.

Learn by doing first.Watch what the hands do in these related signs: one motion, two taps, no extra repeat, or repeat through space.
Build in order.Use this when a noun and verb look similar and you need to tell the difference between an action, one object, and more than one object.
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Noun, verb, and plural movement
Learn the movement difference that keeps certain related signs, like SIT, CHAIR, and several chairs, from blending together.
Ready to compare movements?
Start with the one movement lesson and watch for the dark green hand-movement pills.