Look at these examples to see how zero, first and second conditionals are used.
If you freeze water, it becomes solid.
If it rains tomorrow, I'll take the car.
If I lived closer to the cinema, I would go more often.
Try this exercise to test your grammar.
- Grammar test 1
Read the explanation to learn more.
Grammar explanation
Conditionals describe the result of a certain condition. The if clause tells you the condition (If you study hard) and the main clause tells you the result (you will pass your exams). The order of the clauses does not change the meaning.
If you study hard, you will pass your exams.
You will pass your exams if you study hard.
Conditional sentences are often divided into different types.
Zero conditional
We use the zero conditional to talk about things that are generally true, especially for laws and rules.
If I drink too much coffee, I can't sleep at night.
Ice melts if you heat it.
When the sun goes down, it gets dark.
The structure is: if/when + present simple >> present simple.
First conditional
We use the first conditional when we talk about future situations we believe are real or possible.
If it doesn't rain tomorrow, we'll go to the beach.
Arsenal will be top of the league if they win.
When I finish work, I'll call you.
In first conditional sentences, the structure is usually: if/when + present simple >> will + infinitive.
It is also common to use this structure with unless, as long as, as soon as or in case instead of if.
I'll leave as soon as the babysitter arrives.
I don't want to stay in London unless I get a well-paid job.
I'll give you a key in case I'm not at home.
You can go to the party, as long as you're back by midnight.
Second conditional
The second conditional is used to imagine present or future situations that are impossible or unlikely in reality.
If we had a garden, we could have a cat.
If I won a lot of money, I'd buy a big house in the country.
I wouldn't worry if I were you.
The structure is usually: if + past simple >> + would + infinitive.
When if is followed by the verb be, it is grammatically correct to say if I were, if he were, if she were and if it were. However, it is also common to hear these structures with was, especially in the he/she form.
If I were you, I wouldn't mention it.
If she was prime minister, she would invest more money in schools.
He would travel more if he was younger.
Do this exercise to test your grammar again.
- Grammar test 2
When using Conditional sentences, is it possible to say the result and afterwards the If/when clause?
Thanks in advance
Hello enerobr,
Yes, you can put the clauses in either order:
Note the difference in punctuation: usually a comma between the clauses when we start with the if-clause, and no comma when we start with the result clause.
Peter
The LearnEnglish Team
The section is very good. It helps me improve my grammar.
The structure is usually: if + past simple >> + would + infinitive.
When if is followed by the verb be, it is grammatically correct to say if I were, if he were, if she were and if it were. However, it is also common to hear these structures with was, especially in the he/she form.
Can we use ' I was ....' in second conditional? Thanks....
Hello tranquocvien,
Yes, that is correct, especially in informal situations.
All the best,
Kirk
LearnEnglish team
Why when you are using the zero conditional, you say "If I were (...)" instead of "if I was (...)"?
Hi lolamaserola,
This is actually the second conditional. "Were" in "If I were ..." is a verb form called the past subjunctive, which is not used so much in modern English but is still used in a few phrases and structures such as after if, if only, as if, as though and I wish.
It is also acceptable to use the past simple form instead, e.g. I wish I was rich.
I hope that helps.
Jonathan
LearnEnglish team
Thank you for the lesson.
Hello,
If he falls off his bicycle, he gets hurt. Or
If he falls off his bicycle, he will get hurt.
Thank you so much
Hello Ivyxoxo,
The first sentence (with zero conditional) is possible but unlikely. It means that every time he falls off his bicycle, he gets hurt. This might be true, but it's difficult for me to imagine a situation when I'd use this sentence.
The second sentence (first conditional) means that possibly he will fall and if he does, he will get hurt.
Best wishes,
Kirk
LearnEnglish team