Second conditional
1. To imaginary or improbable situations.
2. To ask hypothetical questions.
3. To give advice.
4. To give reasons why.
If + Past simple + (,) + Would/Wouldn't + V. infinitive
Would/Wouldn't + V. infinitive + If + Past simple
Cuando expresamos lo improbable usamos would, no el past simple.
Ex. If I were you, I'd study more!
Ex. Unless you arrive on time, you wouldn't see the beginning of the film.
If dogs had wings, they would be able to fly.
If I lived in Spain, I would visit Barcelona.
If I were you, I would drive more carefully in the rain.
If I won the lottery, I would take a trip around the world.