U9

I was talking to a woman, and I missed my stop.

A friend of mine deleted all my files when she was using my computer.


http://www.isabelperez.com/happy/tenses/past_cont.htm
http://www.englishtenses.com/tenses/past_continuous
http://www.englishclub.com/grammar/verb-tenses_past-continuous-quiz.htm
http://a4esl.org/q/h/vm/pastpastcont.html
http://www.ego4u.com/en/cram-up/grammar/past-progressive