Zero vs First vs Second vs Third Conditionals
Master all four English conditionals and understand when to use each one for different situations.
Understanding the Four Conditionals
🇬🇧 English Explanation
Zero Conditional
If + present, present
For facts and general truths
If you heat ice, it melts.
First Conditional
If + present, will + infinitive
For real future possibilities
If it rains, I'll stay inside.
Second Conditional
If + past simple, would + infinitive
For hypothetical present/future
If I won the lottery, I would travel.
Third Conditional
If + past perfect, would have + past participle
For regrets about the past
If I had studied, I would have passed.
🇫🇷 Explication Française
Conditionnel Zéro
Pour les faits généraux et vérités universelles
Si tu chauffes la glace, elle fond.
Premier Conditionnel
Pour les possibilités réelles dans le futur
S'il pleut, je resterai à l'intérieur.
Deuxième Conditionnel
Pour les situations hypothétiques/irréelles
Si je gagnais au loto, je voyagerais.
Troisième Conditionnel
Pour les regrets du passé
Si j'avais étudié, j'aurais réussi.
❌ Common Mistakes to Avoid
❌ If it will rain, I'll stay in
✅ If it rains, I'll stay in
Don't use "will" in the if-clause of first conditional
❌ If I would have studied harder...
✅ If I had studied harder...
Don't use "would have" in the if-clause of third conditional
❌ If I win, I would be happy
✅ If I won, I would be happy
Match tenses correctly: second conditional needs past simple
❌ If you will heat water, it boils
✅ If you heat water, it boils
Zero conditional uses present tense in both clauses
Quick Reference Guide
| Conditional | Structure | Use | Example |
|---|---|---|---|
| Zero | If + present, present | Facts, general truths | If you mix blue and yellow, you get green |
| First | If + present, will + verb | Real future possibility | If you study, you will pass |
| Second | If + past simple, would + verb | Hypothetical present/future | If I were rich, I would help others |
| Third | If + past perfect, would have + past participle | Past regrets | If I had left earlier, I wouldn't have been late |