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

This obligation can be expressed in other ways according to the intention and the degree of obligation the signer wants to express. There are different signs in LSC to indicate obligation, such as "duty", "essential", "without fail", "force" and "impose".

    "I must go to the bank for money."
    "To be able to go on the trip it's essential to get your parents' signature."