8Dahl, 6sten. The relation between past time reference and counterfactuality: a new look[Cl//On Conditionals Again Amsterdam: John Benjamins, 1997.
9Goldberg, Adele E. (ed.).Conceptual Structure, Discourse and Language [C] //Stanford, CA: SELI Publications, 1996.
10Plado, Helen.Estonian conditional clauses: The degree of hypotheticality and the link to temporal and conce- ssive clauses [J] .Nordic Joumal of Linguistics, 2013 (1) .