Conditional Sentences

CONDICIÓN , RESULTADO

           IF      ,   PRINCIPAL

• ZERO CONDITIONAL:

USE: To talk about situations that are ALWAYS true. Natural laws.

FORM:     IF + Present simple , Present simple

If you heat water to 100º, it boils.

• FIRST CONDITIONAL:

USE: To refer to situations possible in the future.

FORM:     IF + Present simple , Future simple / Might / Could

If I finish all my homework, I will go to the cinema.

• SECOND CONDITIONAL:

USE: To talk about situations that are improbable refering to present or future. Imaginary situations.

FORM:     IF + Past simple , Would +  infinitive

If I had a million pounds, I would travel around the world.

• THIRD CONDITIONAL:

USE: To talk about situations that would have happened in the past with an imaginary result. Impossible situations.

FORM:     IF + Past perfect , Would + Past perfect

If I had gone out on Saturday, I would have been tired on Sunday.

Links to exercises:
Conditional Type 1
Conditional Type 2
Conditional Type 3
Conditional Mix 1
Conditional Mix 2
Conditional Mix 3
Conditional Mix 4
Conditional Complex Test