1. Mary hadn't finished her dinner when her sister came.
2. Tom had returned home before the storm broke out.
3. Stephen was looking for a job for half a bear when he found one.
4. Reynold had been working as a driver for thirty years when he retired.
5. How long had you been waiting when the boss announcedthat he couldn’t see you?
6. We had been sunbathing for two hours when it started to rain.
