One way to approach the syntax of focusing adverbs in line with the cartographic enterprise would be by recognizing that each one of the different classes of these AdvPs would have a distinct position of Merge, in line with the "One Feature, One Head Principle" (KAYNE, 2005).
The following data suggest that different classes of focusing AdvPs are also rigidly ordered among each other and with respect to the other adverbs of the Cinque hierarchy:
That is a good reason for completely abandoning the possibility of free and direct adjunction of AdvPs to DPs and other constituents of the clause.
As previously stated, considering the seven classes of focusing adverbs mentioned in the above table, the paper only investigates the position of exclusive adverbs with respect to the other AdvPs of the Cinque hierarchy.
There are some syntactic properties of higher AdvPs that are also valid for so 'only', as we are going to see in the next sections.
In the sequence, I present some syntactic properties mentioned in Tescari Neto (2013) as being common to those adverbs called high AdvPs by Cinque (sentential adverbs in the general literature) .
The second property has to do with the ability that low AdvPs have in allowing the extraction of the constituent modified by them.
Therefore, as we have seen in this section, so 'only' behaves like a high adverb, as far as the three properties generally attributable to high AdvPs are concerned.
Again, quantificational AdvPs behave differently from focusing so/only, which, in turn, behaves like a high adverb, as we are going to see.