Conditional forms and exercises

We have learnt the conditional forms:

Type 0. If + Present tense + Present tense i.e.: 

• If I press the button, the bell rings. / The bell rings if I press the button.
• Si pulso el botón el timbre suena.

Type 1. If + Present tense + Future tense i.e.: 

• If you study, you will pass your exam.
• Si estudias pasarás tú examen.

Type 2. If + Past simple tense + Conditional simple i.e.: 

• If you studied, you would pass your exam.
• Si estudiaras pasarías tú examen.

Type 3. If + Past perfect + Perfect infinitive i.e.: 

• If you had studied, you would have passed your exam.
• Si hubieras estudiado habrías pasado tú examen.

Besides, you will be able to know more about this topic in the following links and have to do the exercises related to it at home:

• Unit 38. If I do ... and If I did ...
• Unit 39. If I knew ... I wish I knew.
• Unit 40. If I had known... I wish I had known ...

We haven't to know anything about "I wish I knew" form so you don't need to study nothing about the part of this unit related to it.