Conditional sentences in Russian are of two types, depending on whether the speaker means that in certain circumstances (a) smth will/will not happen or (b) sth might happen. Usage in the two clauses of a conditional sentence (i.e. the subordinate clause which contains the condition, usually introduced by eсли, if, and the main clause, which states the consequence) differs in the two types of conditional sentence.
Note: in both types of conditional sentence the clause stating the consequence may be introduced by то or тогдa (then), provided that it follows the clause containing the condition.
Note: in both types of conditional sentence the clause stating the consequence may be introduced by то or тогдa (then), provided that it follows the clause containing the condition.