Adverbhood

The only candidate for adverbhood seems to be schnell, as indicated by the English gloss.

Using form as a criterion for adverbhood leaves us with a highly mixed bag of forms with little in common, such as HOWEVER, OFTEN, NOT, VERY, MORE, EVEN, OUT, DOWNSTAIRS, etc.

The primacy of semantic features in creating an inventory tends to make it necessary to define degrees of adverbhood or subordinatorhood, for instance, and in this analysis discoursal and textual properties of clause-combining devices play an important role.