Affirmation, negation and imperative

1. Affirmation
         a) Without specific non-manual marking
         b) Affirmative headnod
         c) Affirmative signs
2. Negation
         a) Headshake
         b) Headshake and negative sign
                   b.1 Sentence negation
                   b.2 Signs incorporating negation
3. Imperative
         a) Basic form
         b) Alternative forms for command expression

Imperative sentences, acting the role of commands, are formed normally without specifying the second person pronoun: the person whom the command is addressed to is looked into the eyes, and the verb is signed with a shorter, more strained movement that may be accompanied by a forward movement of the head.

    "Turn off the TV right now."
    "Please turn on the light."