I am wondering if anybody could help me.
Let's see my sentences:
As I walked I listened to music. OR As I was walking I was listening to music. I feel that both sentences are correct. But some language book prefers the first one.
I learnt that WHILE likes progressive tense but I found a languge book where I foun the following: While she walked, she watched the birds.
My another problem is in connection with AS/WHEN /WHILE
When/As I was sitting, she entered the room.- Is it correct?
As he entered the room, he started to sing. Does it mean that first he enters then he starts singing or the actions happen at the same time.
Does it mean that in these sentences AS and WHEN have the same meaning or at least the same structure after them?
Thanks in advance.