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Let's figure out the difference between while and when first.
When something can be instantaneous, things can happen at the same time or sequentially.
while is used for concomitant and simultaneous persistence.
Usage of while and when in the past continuous tense: Indicates that two persistent actions occurred at the same time in the past. The continuous action is in the past tense, which is naturally going to +ing, and the transient action is generally in the past tense, so it is not +ing
Therefore, it is the action after while +ing, and the action after when is generally not +ing
was doing my homework when someone knocked at the door.
were walking along the river when suddenly it rained.
he was waiting at the bus stop,the traffic accident happened.(The clause after while must be in the continuous tense).
i was reading ,my sister was sleeping.(Indicates contrast, both are used in continuous tense).
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Summary. When and while both denote when ......time, but when can indicate a certain time or a certain period of time, but while can only represent a certain period of time, not a certain point of time. For example:
when i was eating an apple,my mom came home.While I was eating the apple, my mom came home. while you are playing football,your mom called you.
When you play football, your mom gives you a s***! The former when refers to what happens later while eating, while the time-guided adverbial clause refers to what happens later during the kicking!
Past continuous tense when and while and ask 10 questions.
When and while both denote when ......time, but when can indicate a certain time or a certain period of time, but while can only represent a certain period of time, not a certain point of time. For example: when I was eating an apple, my mom came home
While I was eating the apple, my mom came home. while you are playing football,your mom called you.When you play football, your mom gives you a s***!
The former when refers to what happens later while eating, while the time-guided adverbial clause refers to what happens later during the kicking!
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