A notorisouly tough aspect for new cuers is assigning the correct handshape for /s/ and /z/. This decision occurs frequently in English because it affects plurals (e.g., cats, dogs, horses), posessives (e.g., Matt's, Pam's, and Rich's), as well as inflections for subject-verb agreement (hits, spills, washes). 

Rule

The 

See Also

• Allomorphy