The poor man on the bike was shouting at them. - an activity in progress in the past, While he was travelling in a taxi, he saw a crime.  - an activity in progress in the past interrupted by a sudden action, He ran out of the taxi. - a completed action in the past, He saw the two muggers and told the driver to stop. - two completed actions in the past that happened one after the other,

Past simple v. past continuous rules

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