in the event VS in case VS if

Term	Definition & Example Sentences
In the event	This phrase is used to discuss a possible future occurrence. It suggests that something might happen and prepares for that possibility. It's often used in formal contexts In the event of a fire, follow the emergency exit signs. In the event of severe weather, the school will close. In the event of an emergency, please follow the exit signs.  In the event of system failure, contact technical support immediately. In the event that you can't attend, please notify us in advance. In the event of a power outage, the backup generators will activate.
In case	This phrase is used to talk about precautions or preparations for a potential future event. It's slightly more informal than "in the event." is used for precautionary measures. Bring an umbrella in case it rains. Keep your phone charged in case you need to make an emergency call. Take a map in case you get lost. Pack some snacks in case you get hungry during the trip. Leave early in case there is traffic.
If	This is the most common and flexible of the three. It introduces a condition and is used to discuss situations that are possible, probable, or hypothetical. is the most versatile, introducing conditional situations. If it rains, we'll stay indoors. If it rains, we will stay indoors. If you need help, just ask. If the store is closed, we'll come back tomorrow. If you finish your work early, you can leave. If you have any questions, feel free to contact us.