CONDICIONALES / CONDITIONALS

Un breve repaso a las condicionales:

ZERO CONDITIONAL:   If + present simple + present simple
                                     
                                          If you heat water to 100 degrees, it boils.
                                          If I eat a lot of junk food I get fat.
                                          If I am late at work my boss gets furious.

(Se usa para indicar datos genéricos o situaciones cuyo resultado siempre es el mismo. Realmente no es una condicional. Se puede sustituir el "if" por "when").

FIRST CONDITIONAL:  If + present simple + will + infinitive

        If I have time I will help you.
        If she goes shopping she will buy you a present.
        If you don't study for your exams we won't buy you a bike.

(Se usa para indicar hechos posibles en el futuro, promesas, ofrecimientos, amenazas).

SECOND CONDITIONAL:  If + past simple + would + infinitive

                If I were you I would read that book.
                If we had more time, we would visit you more often.
                If she were rich, she would travel around the world.

(Se usa cuando hablamos de hechos hipotéticos o poco probables tanto del presente como del futuro. Para dar consejos. Ten en cuenta que normalmente se usa "were" en lugar de "was" con I, she y he).

THIRD CONDITIONAL:  If + past perfect + would have + past participle

 If I had known it, I would have done things differently.

 If she had gone to the party, she would have met her ex-boyfriend.

 If my neighbours had saved some money, the would have gone on holiday.

(Se usa cuando hablamos de hechos en el pasado que no han sucedido).