---------- Forwarded message ---------- From: lura dosa <luradsa@xxxxxxxxx> Subject: PPProgressive Hello.. After reading Barry's answers to the grammar questions, I wished I'd sent this question earlier. I want to know why we can't use the past perfect progressive in the following sentence, as the answer key suggests the past perfect simple only, or maybe wee can!? Walt Disney _________________ (produce) cartoons for nearly 40 years before he died in 1966. Thanks for your help.