.The police ordered the demonstrators to [STRIKE]draw[/STRIKE] pull back, which [STRIKE]triggered[/STRIKE] drew boos and shouts from the crowd.
I'd probably use "triggering/drawing" rather than "which triggered/drew" but that's a personal preference.
Why you will write the +ing form?
ems called it her personal preference. She thinks the sentence sounds better and more natural that way, and so do those of us who clicked Like.Why [STRIKE]you will write[/STRIKE] would you use the +ing form?