แต่ยังไม่เคยมีเหตุการณ์ที่รุนแรงเกิ

แต่ยังไม่เคยมีเหตุการณ์ที่รุนแรงเกิดขึ้นเลย

But there has never been a violent incident happened.

Results (English) 1:

But there has never been any serious events occur at all.But there has never been a violent incident happened.

Results (English) 2:

But there has never been a violent incident that happened

But there has never been a violent incident happened.

Results (English) 3:

But never had a catastrophic event occurs.But there has never been a violent incident happened.