soms heeft een zin zowel de verleden tijd als de verleden tijd
1. I
was cycling to school when
I saw an accident.
2.While Henry was having a drink at the bar, his wife was swimming in the sea
3.He was swimming in the ocean when he saw a dolphin.
4.He heard a loud bang while he was taking to a his friend
5.While he was taking a shower, his dogs were eating his stake.
De signale woorden voor past continuous: when en while