Workbook page 10, ex. B
- had been waiting
- had you been chatting
- had been reading / had read
- had been flying
- had had
- had been driving / had run / had swerved / had crashed
- had fallen
- had finally found
- had been looking
By the way, here you have links for non-continuous verbs:
http://www.englishpage.com/verbpage/types.html
http://www.ecenglish.com/learnenglish/lessons/non-continuous-verbs
http://www.ecenglish.com/learnenglish/lessons/non-continuous-verbs