How do I show that there is more than one sister?
In ASL, you don't always need to change the sign itself to make it plural. You can establish plurality by signing a number first (like 'three sisters') or by adding a sign like 'many' before or after 'sister'.
Why do female signs start at the chin?
In ASL, the face is divided into gendered zones. The lower half of the face, specifically the chin and jawline, is used for female signs (like mother, aunt, and girl). The upper half, near the forehead, is used for male signs.
Is the sign for 'brother' similar to 'sister'?
Yes, they are very similar! The sign for 'brother' uses the exact same handshapes and downward motion, but it begins with the dominant hand at the forehead instead of the chin.