GRAMAR! I WASN'T LISTENING vs I DIDN'T LISTENING

hello there.

I have a question to teachers. how to explain the diferences between those sentences?

  1. John was drowing in the river.
    John drowned in the river.
  2. I didn’t listen.
    I wasn’t listening.

HOW DO WE CHANGE THAT KIND OF SENTENCES?
To know who the murder was I had to read the last chapter.
Not until …

what’s the diference:
I watched TV all day? vs I were watching TV all day?

thanks :slight_smile:

can anyone help me?? please??

ohhh thanks very much for replying. could you please tell me how do we form that sentences?? not until…? are there any rules?? :slight_smile: