This use talks about things that might happen in the future or possible situations. It is often used when giving warnings or talking about results.
If trouble happens, call me.
What will happen if we wait?
When something happens by chance, it means it occurs without planning or by accident. People use it to talk about lucky or unexpected meetings or finds.
I happened to see her today.
He happened to find the key inside.
This meaning refers to asking if something is a good time or if plans are okay to take place. It is informal and often used in spoken English.
Does tomorrow happen for the meeting?
Will it happen at 5:00 pm?
This use shows that some things occur naturally or as a result of conditions, often without anyone controlling them. It is common in explaining causes or general facts.
Accidents happen when people are careless.
Mistakes happen during learning.
This meaning uses 'happen' to talk about things that come to a person, good or bad. It is often used to describe experiences or fortunes.
What will happen to you in the future?
Good things happen to kind people.
