Here is a reading exercise I used to show how past continuous can be used together with simple past. We read the story as a group with the assistance of the PPT and then I had them underline or highlight both simple past and past continuous.
I introduced the two tenses on the board provding a lot of example with the students help. I focused on the use of the coordinating conjunctions WHILE and WHEN.
Ex: "I was walking down the street
when it began to rain."
" I was eating kimbab
when my mom called."
" I was standing under a tree
when it began to rain."
I also provided examples that highlighted the use of the past continuous when referring to specific times:
"At ten o'clock last night, I was watching TV at home."
"Last August I was going to English camp
while I was on summer vacation.
Or when two actions are happening simultaneously:
"
While I was reading a book in my bedroom, my brother was watching TV in the living room"
I wanted to do an Alibi activity with my class but there are not enough students to make it interesting. I think it would be perfect if you have a larger class though.
http://www.eslcafe.com/idea/index.cgi?display:927874509-10974.txtI attached a worksheet that I found on Bogglesworld to save some time.