Comp in matrix sentences

[Annarita Puglielli]

Dear Lingtyp friends,

I wonder if you can give me information about any language that has an 
explicit complementizer that introduces the matrix in a declarative 
sentence. What happens then in imperative and interrogative sentences, or 
when in a declarative sentence there is an explicit performative verb?
Eventually please send me also references.
Thank you in advance.

Prof. Annarita Puglielli
Dipartimento di Linguistuica
Università degli Studi Roma Tre
Roma- Italy