Past Continuous = Something which happened over a period of time in the past.
See what the little girl was doing :
|4 o'clock||4 o'clock to 5 o'clock||5 o'clock|
|Ann took a book (a quick action)||Ann was reading the book. (For one hour)||Ann put the book back (a quick action)|
How to use the Past Continuous
|Past Continuous - Examples|
|Yesterday at 4 o'clock I was watching football.|
|Last week at this time we were visiting our friends|
|Last night she was writing a letter to her mother.|
|Yesterday he was working.|
All these things took quite a long time.