If + Present Simple , will + infinitive
If it rains, I'll take an umbrella.She'll pass the exam if she studies.Real or likely situations in the present or future.
might + infinitive — possibility (less certain than will)
I might go to the party. (= maybe, I'm not sure)Take an umbrella — it might rain.| Certain | Possible | |
|---|---|---|
| Positive | It will rain. | It might rain. |
| Negative | It won't rain. | It might not rain. |
If + Past Simple , would + infinitive
If I had more time, I'd travel the world.She would feel better if she got more sleep.Imaginary, hypothetical or unlikely situations in the present or future.