There are four types of conditional Sentences

• • Zero Conditional (REAL Condition) Used for facts:

Formula:  If Clause (Present Indefinite), Main Clause (Present Indefinite).

1. 1. If you boil water, it evaporates.    

1. 1. If the sun sets, it gets dark.

• • First Conditional (REAL/POSSIBLE Condition):

These sentences express a real or possible condition.

Formula:  If Clause (Present Indefinite), Main Clause (Future Indefinite).

1. 1. If you come here, I shall help you.              

1. 1. If she goes to school, she will get award.

• • Second Conditional: (Unreal Condition)

These sentences express imaginary condition.

Formula: If Clause (Simple Past), Main Clause (Would/should/could + V₁).

1. 1. If you worked hard, you would win prizes.

1. 1. If I were a student, I would work hard.

• • Third Conditional: (Unchangeable Past Condition)

These sentences express unchangeable past condition.

Formula:   If Clause (Past perfect), Main Clause (Would have + V₃).

1. 1. If he had worked hard, he would have passed.

1. 1. If I had gone there, I would have met him.