There are four main types of conditionals in English that you need to know:
1. Zero Conditional: Used for facts or things that are always true. The structure is:
- If + present simple, present simple.
- Example: If you heat water to 100 degrees Celsius, it boils.
2. First Conditional: Used for real and possible situations in the future. The structure is:
- If + present simple, will + base verb.
- Example: If it rains tomorrow, I will stay home.
3. Second Conditional: Used for unreal or hypothetical situations in the present or future. The structure is:
- If + past simple, would + base verb.
- Example: If I had a million dollars, I would travel the world.
4. Third Conditional: Used for unreal situations in the past or regrets. The structure is:
- If + past perfect, would have + past participle.
- Example: If I had known about the party, I would have gone.
