This section deals with matrix clause complementizers. They parallel subordinate complementizers in every way except that their carry the tone instead.
In the absence of a sentence connector and/or if the previous sentence had no overt illocution, they can mark the beginning of a new sentence by marking the beginning of the matrix clause.
|∅||declarative or non-polar interrogative|
|lả||declarative or non-polar interrogative|
Everything covered in the section on subordinate complementizer phrases applies here. The only difference is that instead of being passed to a verb, matrix clause complementizer phrases are passed to the illocution operator.
The most common matrix complementizer is the unpronounced one.
This is equivalent to the following sentence: