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

In sign language an affirmative sentence can be expressed in three different ways. First, there are sentences that don't contain any specific non-manual marker.

    "They've already delivered the furniture."
    "There are two weeks to go for the Easter holidays."