Past continuous was were v1 ing
Answers
Often, to describe the background in a story written in the past tense, e.g. "The sun was shining and the birds were singing as the elephant came out of the jungle. The other animals were relaxing in the shade of the trees, but the elephant moved very quickly. She was looking for her baby, and she didn't notice the hunter who was watching her through his binoculars. When the shot rang out, she was running towards the river..."
to describe an unfinished action that was interrupted by another event or action, e.g. "I was having a beautiful dream when the alarm clock rang."
to express a change of mind: e.g. "I was going to spend the day at the beach but I've decided to get my homework done instead."
with 'wonder', to make a very polite request: e.g. "I was wondering if you could baby-sit for me tonight