1. Only (D) is possible: His grandpa has been dead for ten years. (A) is impossible because we cannot use present perfect with a specific time reference. (B) is gramatically possible but makes no sense unless after 10 years the grandfather was

Many ESL grammar books require learners to convert active sentences to passive ones. If the book was well-written, the active sentences will be appropriate for conversion to passive ones. Unfortunately, there are plenty of grammar books and