Dual Panel08813 Participle
1) The participle represents an action or condition in its unbroken
continuity, and corresponds to the English verb, "to be" with the
present participle. It may be used of present, past or future time.
1a) present time
what are you doing
1b) past time
"he was still speaking" when another came
1c) future time
we are destroying - e.g. are about to destroy