Conditionals or 'if clauses' describe the result of something that might happen (in the present or future) or might have happened but didn't (in the past) .
There are four kinds of conditional structure:
- The Zero Conditional: it expresses what always happens if or when a certain action takes place.
(if + present simple, ... present simple)If you heat water to 100 degrees, it boils.
- The First Conditional: We use the first conditional to talk about something that will happen (the result), if a particular condition (which is likely to happen) is met.
- (if + present simple, ... will + infiniTive)
- If it rains tomorrow, we'll go to the cinema.
- The Second Conditional:it is a way of talking about unlikely events or situations.
(if + past simple, ... would + infinitive)If I had a lot of money, I would travel around the world.
- The Third Conditional (IMPOSSIBLE SITUATIONS)
(if + past perfect, ... would + have + past participle)If I had gone to bed early, I would have caught the train.