IF

IF

1. + Past Perfect + Would/Might/Could have

   • TYPE 3
     • When we want to imagine doing or changing something in the past
       • Example: If he hadn’t arrived late, he wouldn’t have missed the train

2. + Past Simple + Would -> Verb

   • TYPE 2
     • Improbable situation
       • Example: If I knew her name, I would tell you

3. + Present + Present

   • TYPE 0
     • Truth condition
       • Example: If you cool water at 0º, it frezees

4. + Simple Present + Furure

   • TYPE 1
     • Probable situation
       • Example: If I have time, I will help you

5. Conditionals