The document discusses different types of conditional sentences. The zero conditional uses the present simple tense to describe things that are always true when the if-clause occurs, such as water boiling at 100 degrees. The first conditional uses will/can + infinitive to talk about possible future events, like answering the phone if it rings. The second conditional uses would/could + infinitive to describe unlikely or imaginary situations, such as saying you would travel the world if you were rich.

1. CONDITIONALS 1st 2nd zero IF ….

2. The zero conditional is used to talk about things which are always true – scientific facts, general truths, and so on. Zero Conditional

3. present simple. Present simple, main clause if clause

4. it boils. If you heat water to 100 degrees , main clause if clause if you heat it to 100 degrees. Water boils if clause main clause

5. it burns. If you expose phosphorus to air , main clause if clause if you expose it to air. Phosphorus burns if clause main clause

6. she always blushes. If a man looks at her , main clause if clause if a man looks at her. She always blushes main clause if clause

7. IMPERATIVE + IF CLAUSE don’t disturb her. If Irene is tired , main clause if clause if she is tired. Don’t disturb Irene if clause main clause

8. WILL / CAN + IF CLAUSE 1st conditional real / possible will/can + infinitive. Present simple, main clause if clause

9. I will answer it. If the phone rings , main clause if clause we can go to the beach. If the weather is sunny later, main clause if clause

10. 2nd conditional WOULD / COULD + IF CLAUSE unreal would/can + infinitive. Past simple, main clause if clause

11. I would travel around the world. If I were rich, main clause if clause I would pass my English exam. If I studied more, main clause if clause