Usage of when, while and as

1

I have searched for usage of when and while but I am still confused.

 

While I was watching TV, she came in.

When I was watching TV, she came in.

As I was watching TV, she came in.

 

I know sometimes they are not interchangeable for the same meaning, but I still cannot find any meaning difference between the three sentences. So I feel like they mean the same in the example sentences. What do you native English speakers think?

 

Thank you so much again and have a good day.

asked Dec 08 '13 at 11:11 Hans Contributor

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