Conditionals are used to express both real, likely and unreal situations. As a result, tenses used with them are not flat; they change. That is why the difference between ‘If I arrive’ and ‘If I had ...

The conditional tense is used to describe what someone would do or what would happen in the future. It can also be used to express ambitions and intentions. For example: ...

The conditional of hay (there is/there are) is habría (there would be), eg en mi ciudad ideal habría una piscina (in my ideal town, there would be a swimming pool).