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III
Describing activities that took place in the past
Simultaneously:
(Adverb). Something happening
at the same time.
Ongoing:
Continuing to exist, happen or progress.
The children were marching
while
the boy was selling snacks.
The baby was sleeping
when
the telephone rang.
John was jumping the rope
when
he fell and broke his leg.
Past continuous form
When and While
When
introduces a second action. The second action interrupted the on going action.
Use the simple past with the when clause and the past continuous for the ongoing
action.
You use
while
and the past continuous with two actions in the same sentence to
express the idea that both actions were happening at the same time. The actions
are parallel.
Examples: