Yes and no "Ja", and the affirmative answer to "Snakker du ikke norsk?" ("Do you not speak Norwegian?") is "Jo", while the negative answer to "both" questions is "Nei". Danish, Swedish, Norwegian, Icelandic, Faroese, Hungarian, German, Dutch, and French all have three-form systems. Swedish and Danish have "ja", "jo", and "nej". Norwegian has "ja", "jo"/"jau", and "nei". Icelandic has "já", "jú" and "nei". Faroese has "ja", "jú" and "nei". Hungarian has "igen", "de", and "nem". German has "ja", "doch", and "nein". Dutch has "ja", "jawel", and "nee". French has "oui", "si", and "non". Swedish, and to some extent Danish and Norwegian, also has
Yes and no der Gabelentz, Henry Sweet, and Philipp Wegener have all written on the subject of sentence words. Both Sweet and Wegener include "yes" and "no" in this category, with Sweet treating them separately from both imperatives and interjections, although Gabelentz does not. Watts classifies "yes" and "no" as grammatical particles, in particular "response particles". He also notes their relationship to the interjections "oh" and "ah", which is that the interjections can precede "yes" and "no" but not follow them. "Oh" as an interjection expresses surprise, but in the combined forms "oh yes" and "oh no" merely acts as an intensifier; but