Answer:1. Zero Conditional: - Structure: If + present simple, present simple - Meaning: Used for general truths, scientific facts, or things that are always true. - Example: If you heat water to 100°C, it boils.2. First Conditional: - Structure: If + present simple, will + base verb - Meaning: Used for real and possible situations in the future. - Example: If it rains tomorrow, we will cancel the picnic.3. Second Conditional: - Structure: If + past simple, would + base verb - Meaning: Used for hypothetical or unlikely situations in the present or future. - Example: If I won the lottery, I would travel the world.4. Third Conditional: - Structure: If + past perfect, would have + past participle - Meaning: Used for hypothetical situations in the past that did not happen. - Example: If I had studied harder, I would have passed the exam.
Answer:Zero conditional sentences express general truths or known facts. First conditional sentences express possible future events or actions that are likely to happen. Second conditional sentences express unlikely or unrealistic future events. Third conditional sentences express hypothetical past outcomes or consequences.