When a negative order is expressed in LIS, there are some interesting differences with respect to positive imperatives. Both declarative and imperative clauses employ a manual sign for negation displaying the same handshape but differing in its movement realization. In negated declaratives, the manual sign (glossed not) produced with an extended index finger displays a short right-to-left repeated movement, as in (a), while in negative imperatives the manual sign (glossed no) is produced with a single tensed and wide movement, as in (b).
fe hs
a. ix3 eat not
‘He doesn’t eat.’
fe hs
b. eat no
‘Don’t eat!’