conditional

Zero conditional

This conditional refers to a situation which is always true (universal truths): If you freeze water, it turns Into ice.

If clause                        Main clause
If + Present tense        Present tense
If you freeze water      it turns Into ice.

Examples:

If you freeze water, it turns into ice.

If I work too much, I get tired.

If she eats hamburgers, she gets an allergy.

If they come here, they always bring a present.

first Conditional

Se forma con if + simple present + simple future. Se emplea cuando una situación es real o posible: If it rains today, I'll stay at home.

If clause                       Main clause

If + Present tense    will / can / may / must + verb

If it rains today,        I'll stay at home

Examples:

If it rains today, I'll stay at home.

If he is busy now, I will come back tomorrow.

If I have time, I'll visit my parents this afternoon.

If it is warm tomorrow, we'll go to the beach.

second Conditional

It refers to a hypothetical situation and the structure is formed as if + simple past + simple conditional.

Examples:

If I won the lottery, I would travel around the world.

If I were in Brazil, I would go to Rio de Janeiro.

If I were you, I would buy that car.

If he were in my place, he wouldn't do this.

third Conditional

Third Conditional, Type III, also, refers to a hypothetical situation of the past and shaped by the structure: if + past perfect + perfect conditional.

If clause                               Main clause

If + Past Perfect tense        would/could/might + have + past participle

Examples:

If he had worked more, he could have saved more money.

If they hadn't drunk so much last night, they wouldn't have felt sick today.

If my sister had been here, she would have enjoyed this.

If it hadn't rained, we would have gone fishing.