Most of time I heard native English speakers say either "What is happening?" or "what happened?".
When do we use "happen" in present tense?
So, we don't use "what happens?", do we?
Most of time I heard native English speakers say either "What is happening?" or "what happened?".
When do we use "happen" in present tense?
So, we don't use "what happens?", do we?
"what's happening?" Is in the present continuous tense, which is used to talk about things happening at the moment. This is a fairly common question to inquiring about things happening now.
You can use 'happen' in present simple when you talk about things in general that don't apply to a specific time:
what kind of things happen at oktoberfest? (In general, every year) What's happening at oktoberfest? (Whats happening this year?)
It's also popular in some sayings: what happens in Vegas, stays in Vegas (again, this is disconnected from a particular 'now' time)