The "one" hand shape is used with either hand. The index finger is pointed upward and the palm is facing in. Move the hand from the same side of the body to the opposite side of the body than the hand that is being used. This sign may also be seen inverted, with the index finger pointing downward.
Point to the person you are asking, sign 'COME', and then sign 'US' by sweeping your index finger from one side of your body to the other with your palm facing inward.
Sign 'THEY', then use the directional sign for 'GIVE' moving toward your body, followed by the sign for 'US' sweeping across your chest to show who received it.
Sign 'TEACHER', then sign 'HELP' moving from the imaginary teacher's position toward yourself, finishing with the 'US' sign to indicate the whole group was helped.
Point to the person you are asking, sign 'COME', and then sign 'US' by sweeping your index finger from one side of your body to the other with your palm facing inward.
Sign 'THEY', then use the directional sign for 'GIVE' moving toward your body, followed by the sign for 'US' sweeping across your chest to show who received it.
Sign 'TEACHER', then sign 'HELP' moving from the imaginary teacher's position toward yourself, finishing with the 'US' sign to indicate the whole group was helped.
You can use either hand, but it is generally best to use your dominant hand. Just remember to start the sign on the same side of your body as the hand you are using, and move it across to the opposite side.
Both variations are perfectly acceptable and mean the exact same thing. Pointing the index finger upward is the most common way to sign it, but some signers naturally prefer the inverted version with the finger pointing downward. Use whichever feels more comfortable.
In standard ASL, the signs for 'us' and 'we' are exactly the same. You use the same sweeping motion with the 'one' handshape across your body. The specific English translation is simply understood based on the context of your sentence.
