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

Another mechanism involves the use of signs incorporating negation, such as, for example, "not yet", "never", "nothing/nobody/not at all", "without", "not to be able", "not to have/be", "not to know", "impossible", "not necessary/not needed", "nor/neither", "forbidden", etc. These signs are typically placed after the element they negate and tend to appear at the end of the sentence.

    "Have you never been on a plane? No, nor on a boat, I'm very scared."
    "In order to travel around Europe you don't need a passport, the identity card is enough."
    "I've not yet finished the job you asked me to do."
    "My friend spent all night studying and not sleeping at all."