Write two sentences for each situation. use
when and while.
1/ wait for the bus/ see lightning
i was waiting for the bus when i saw lightning.
i saw lightning while i was waiting for the bus.
1 we/ski in the alps / see / an avalanche
2 they / watch the news / the lights / go out
3 people/sleep/ the wildfire / arrive
4 l/ do this exercise / the class / finish​

1.we were skiing in the Alps when we saw an avalanche/we saw an avalanche when we were skiing in the Alps

2.they watched the news when the lights went out/the lights went out when they watched the news

3.a person is sleeping when a forest fire arrives/a forest fire arrives when a person is sleeping

4.I do this exercise when the entire class has already finished/ the entire class has already finished when I do this exercise