We discuss questions related to syntactic analysis in the tree of bipolar constructions (adverse, concesivas, conditional, causal, consecutive, compared) and their links. Specifically, the distinction between "conjunction" and "discursive marker" is addressed, and they are also classified by their value. Of the traditionally called conjunctive phrases separate from them those that also admit the analysis as "preposition term " (The case of "for that") "term prepositive locution" (The case of "on the occasion of that") or "adverb MOD" the case of "whenever" when it has temporal value