1. The document discusses conditional sentences with "if clauses" that use type 2 conditionals. The if clause uses the past tense and the main clause uses "would."
2. Type 2 conditionals are used to express unreal or unlikely present/future situations, such as dreams, imagined conditions, or things that are not actually happening. Examples include "If I had money, I would give you" or "If it didn't rain, we would go on a picnic."
3. The document provides additional notes on type 2 conditional structures, including using modal verbs in both clauses, replacing "was" with "were," including negative clauses, asking questions, and abbreviating "would" to "'d."