The second is used for unreal or unlikely situations in the present or future, and for giving advice. The form is if + past simple, then would + base verb: If I had more time, I would learn the piano. The past simple here does not talk about the past. It shows that the situation is imaginary.
The form
The second has an if clause and a result clause. In the if clause, use the past simple. In the result clause, use would plus the base verb.
If + past simple, would + base verb. If cities banned private cars, the air would be much cleaner.
If the if clause comes first, use a comma. If the result clause comes first, there is no comma: The air would be much cleaner if cities banned private cars. The negative result uses would not or wouldn't. In speech, would often shortens to 'd: I'd travel more if I had the money.
- If I had more free time, I would learn the piano. · I would learn the piano if I had more free time.
- If the government taxed plastic, people would use less of it. · People would use less of it if the government taxed plastic.
What it means
Use the second when you imagine something that is not true now, or is very unlikely to happen. If you say If I won the lottery, I would travel the world, you do not expect to win. The past simple form is a signal that the situation is imaginary.
This is why the past simple here does not talk about time. If I had a car is about now, not yesterday. Compare it with a real possibility: If I get a car, I will drive to work uses the first conditional, because getting a car is a real option.
- Unreal present: If I lived by the sea, I would swim every day.
- Unlikely future: If more people worked from home, cities would be quieter.
- Advice: If I were you, I would apply for that course.
- Polite requests: It would be great if you could send me the details.
If I were you
With the verb be, formal English uses were for every person in the if clause, including I, he and she: If I were rich, If she were the manager. In everyday speech, many people say If I was, and you will hear it. In IELTS Writing, were is the safer, more formal choice.
The fixed phrase If I were you is the standard way to give advice: If I were you, I would check the course fees first. You can also use it to introduce an opinion in a polite way.
Other modals and a useful variation
You can replace would with could or might in the result clause. Could shows ability or possibility: If I had a car, I could visit my family more often. Might shows weaker possibility: If prices fell, more people might buy electric vehicles.
In a more formal style, you can begin with were to or use inversion: Were the government to raise taxes, spending would fall. You do not need this for IELTS, but it is useful to recognise in reading.
Questions
To ask about an imaginary situation, put would before the subject in the main clause: What would you do if you lost your job? Would you move abroad if you had the chance? The if clause stays in the past simple.
A short answer repeats would only: Yes, I would. No, I wouldn't. This is useful in Speaking Part 3, where you can give a short answer and then explain it.
Common mistakes
The classic mistake is putting would in the if clause: If I would have more money, I would buy a flat. After if, use the past simple: If I had more money. Another error is using the present simple in the result clause: If I had a car, I go everywhere. The result clause needs would.
A third mistake is mixing the second and first in one sentence: If it will rain, we would stay home. Pick one pattern and keep both clauses in the same one. Finally, remember that the verb after would is the base form, with no -s and no -ing: she would go, not she would goes.
Using it in IELTS
The second is useful in Speaking Part 3, where the questions often ask what would happen in a different situation: What would happen if cities banned cars? Answer with a second conditional, then add a reason.
In Writing Task 2, it works well in a solution paragraph: If governments invested more in public transport, fewer people would need cars. This sentence shows a cause, an effect and a link to your opinion in one line.
Who finds this hard?
- Chinese speakers: Chinese does not change the verb to show unreal situations, so the past simple in the if clause can feel strange.
IELTS tip
In Speaking Part 3, a second answer sounds natural and shows range: If the government built more cycle lanes, more people would cycle to work. In Writing Task 2, use one in a solution paragraph, and use were rather than was after if.
Frequently asked questions
Why do we use the past simple in a second conditional?
The past form is a signal that the situation is not real or not likely. It does not refer to past time.
Should I say If I was or If I were?
Were is the formal choice and is best in IELTS Writing. If I was is common in everyday speech.
What is the difference between the first and second conditional?
The first is for real or likely future situations, and the second is for unreal or unlikely ones. Compare If I get a car and If I had a car.
Can I use could instead of would?
Yes. Could shows ability or possibility, and might shows a weaker possibility.
Sources
- Swan, M. (2016). Practical English Usage (4th ed.). Oxford University Press.
- Murphy, R. (2019). English Grammar in Use (5th ed.). Cambridge University Press.