Type 1: If you leave your sister, she will miss you.

Type 2: If you were to leave your sister, she would miss you.

Type 3: If you had left your sister, she would have missed you.

Type 1: I will be angry if you go alone.

Type 2: I would be angry if you went alone.

Type 3: If you had gone alone, I would have been angry.

Type 1: If I am superman, I will fly to the moon.

Type 2: If I were superman, I would fly to the moon.

Type 3: If I had been superman, I would have flown to the moon.

Type 1: John will pass the exam if he studies hard.

Type 2: John would pass the exam if he studied hard.

Type 3: If John had studied hard, he would have passed the exam.