The modal adjectives are comparable to the modal adverbs in that they express some notion of modality. In (158a), for instance, vermeend'alleged/supposed' expresses the fact that the person we are talking about has been mistaken for or is supposed to be the culprit. In (158b) we express the fact that the thing we are talking about may turn out to be a counterexample. In (158c), finally, we express the fact that Peter may possibly leave. As is illustrated in the primed examples, the modal adjectives, not being set-denoting, cannot be used predicatively.

The second subclass is constituted by the amplifiers like those in (159), which scale upwards from some implicitly assumed norm. These adjectives do not attribute a property to the head noun but emphasize that the description provided by noun phrase is applicable to the subject of the copular clause. This means that the adjectives are clearly not set-denoting, which correctly predicts that they cannot be used in the predicative position of the primed examples. The adjectives are, however, clearly related to the adverbs in the doubly-primed examples, which have a similar amplifying meaning.

The third subclass is constituted by quantifiers like gedeeltelijk'partial', half'half', volledig'total' in (160). With (perhaps) the exception of the last example, quantifiers cannot be used predicatively. They are, however, clearly related to the adverbs in the doubly-primed examples.

The fourth subclass is constituted by restrictors such as those in (161), which restrict the reference of the noun. Like the subclasses above, they cannot be used predicatively (with the intended meaning). They differ from these classes, however, in that the restrictors do not have an adverbial counterpart.

Perhaps time adjectives such as gewezen/voormalig/vroeger'former', huidig'present(day)', toekomstige'future', and vorige'previous' also fall into this class.

Besides the cases discussed in the previous subsections, there are many adjectives that do not seem to fall into a well-defined class, but which do seem to be related to adverbs. Some typical examples are given in (163); observe that the nouns are all deverbal.

Some more or less idiomatic examples in which the relation of the attributively used adjectives to the adverbially used adjectives is less direct are given in (164). Observe that these adjectives can also be used predicatively, but then the meaning is slightly different. In this respect they resemble the adjectives discussed in Subsection VI.

Some set-denoting adjectives can be used attributively in a non-qualifying manner, which is excluded if they are used predicatively; the predicatively used adjectives in the primed examples in (165) cannot be interpreted in the same manner as the attributively used adjectives in the primeless examples. Example (165c'') shows that the attributively used adjectives cannot be used adverbially either. Examples of this sort have a more or less idiomatic flavor.

For completeness’ sake, compare the examples in (165a&c) to those in (166a&b); the latter do seem to behave like set-denoting adjectives, given that they give rise to a more or less acceptable result on the intended reading if they are used in predicative position.