-datives
As noted in jack:90, there seem to be two types of verb classes which can appear with -datives. The first type are verbs for which the PP is a complement, while the PP is an adjunct for verbs of the second type. The ``do so'' data in d1-d8 suggest that give and tell belong to the first subclass (despite the optionality of the -PP with tell), while send and kick belong to the second.
Adam gave a book to Debbie and Brian also did so. * Adam gave a book to Debbie and Brian did so to Susan.
Adam told a story to Debbie and Brian also did so. * Adam told a story to Debbie and Brian did so to Susan.
Adam gave a book to Debbie in the library. * Adam gave a book in the library.
Adam told a story to the children in the bedroom. Adam told a story in the bedroom.
Sam sent a letter to Bill and Mark also did so. Sam sent a letter to Bill and Mark did (so) to Susan.
Sam kicked a ball to Bill and Mark also did so. Sam kicked a ball to Bill and Mark did (so) to Susan.
Sam sent a letter at the post office. Sam sent a letter to Bill at the post office.
Sam kicked a ball in the park. Sam kicked a ball to Bill in the park.
-datives
The application of this test to -datives, as shown in d9-d10, provides evidence that these prepositional phrases should be treated as adjuncts since ``do so'' can replace either the full {verb NP PP} constituent or just the {verb NP} constituent.
Adam baked a cake for Debbie and Brian also did so. Adam baked a cake for Debbie and Brian did so for Susan.
Adam sang a song for Debbie and Brian also did so. Adam sang a song for Debbie and Brian did so for Susan.