Grammar / B1+ Grammar lessons and exercises / Second and third conditionals: Unreal conditionals

We use the second conditional to talk about hypothetical or imaginary situations in the present or future — things that are unlikely or not true now.
✅ If there were a fire, it would be impossible to escape.
✅ If you weren’t making so much noise, I could concentrate.
✅ I wouldn’t have a car if I lived in the city.
🔁 Structure: If + past simple / past continuous, ... would/could/might + base verb (or continuous infinitive)
In the if-clause, we can use was (informal) or were (formal) after I, he, she, it.
But for giving advice, we **always** say: “If I were you…”
✅ If he was/were rich, he wouldn’t be living here.
✅ If I were you, I’d call him as soon as possible. ❌ (NOT “If I was you”)
Use a comma after the if-clause **only when it comes first**:
✅ If you weren’t making so much noise, I could concentrate.
✅ I could concentrate if you weren’t making so much noise. (no comma)

We use the third conditional to talk about hypothetical situations in the past — things that **did not happen**, and their imagined consequences.
✅ If you had come to class more often, you would have passed the test.
✅ I wouldn’t have been late if I hadn’t overslept.
✅ He could have died if he hadn’t been wearing a helmet.
🔁 Structure: If + past perfect (simple/continuous), ... would/could/might + have + past participle
The third conditional is often used to express **regret**, **blame**, or **missed opportunities**.
✅ If the jacket had been a bit cheaper, I might have bought it.
(= I didn’t buy it, and I regret it a little.)
For unreal present/future situations.
“If I had more time, I would travel the world.”
(= I don’t have time now → imaginary future)
For unreal past situations.
“If I had had more time, I would have traveled the world.”
(= I didn’t have time then → missed opportunity)