happen · v
happen to do sth
C1 to do something by chance
Dictionary examples:
You don't happen to know her phone number, do you? (11.5)
If you happen to see Peter, say "hi" for me. (13.9)
as it happens
C1 something that you say in order to introduce a surprising fact
Dictionary examples:
As it happens, her birthday is the day after mine. (16.6)
happen (RESULT)
A2 to be the result of an action, situation, or event that someone or something experiences
Dictionary examples:
What happens if I eat too much ice cream? Brain freeze! (0.0)
If you forget your umbrella, rain always happens! (0.0)
If you mix red and white paint, pink happens! (0.0)
Did you hear what happened to us last night? (13.9)
What happens if we can't get enough tickets? (20.1)
happen (HAVE EXISTENCE)
A2 If an event or situation happens, it exists or starts to be done, usually by chance.
Dictionary examples:
The dog happened to eat my homework, I promise! (0.0)
Why does my phone always happen to die when I'm lost? (0.0)
Why does rain always happen when I forget my umbrella? (0.0)
We can't let a mistake like this happen again. (15.9)
Were you there when the accident happened? (19.7)