The document discusses the conditional mood and different types of conditional sentences:
- Real conditional sentences use the present tense in the if-clause and future tense in the main clause to refer to possible real events.
- Almost unreal conditional sentences use past tense in both clauses to refer to unlikely or hypothetical events.
- Absolutely unreal conditional sentences use past perfect tense in the if-clause and conditional forms like "would have" in the main clause to refer to impossible past events.
- Phrases like "if I were you" are used to give advice and translated as "на твоём месте" in Russian.