Okay, the NASA website says
Howard's final descent has BEGUN.
The Big Bang Theory Season 6, Episode 4
...if you'd BEGUN with that thought.
The Big Bang Theory Season 1, Episode 15
This war has just BEGUN.
Game of Thrones Season 2, Episode 10
Well, I had just BEGUN puberty...
The Big Bang Theory Season 8, Episode 23
Logan:
It's BEGUN.
Westworld Season 2, Episode 10