Armin S. answered 03/29/19
Here we go...
- Does the quote from the Grimms represent common German usage?
Yes, "kam gekrochen" is proper past tense and translates directly into "came crawling."
- What is the psychological account of that usage?
None, really. It simply indicates the lack of grace of an amphibian on land. The only psychology here is the following poor treatment of the frog by the princess, based on her false assessment that it is a lower form of life to be looked down upon.
- What are the limits on the usage? For example, could one also have used a form of "kriechend" in the quote, or is "gekrochen" the only permissible form? Does what is permitted or mandatory depend on whether the verb denotes a movement (per my hypothesis)? Particularly critical for me would be whether it is permissible to substitute "heraufkriechend" for "heraufgekrochen" in the quoted passage.
"Kriechend" would be adverbial and require another verb before it, like "er schleppte sich kriechend nach Hause" ("he dragged himself home crawling").
HTH