On the other hand, he did not accept as well founded the charge made by some of his criticsthat while he was a good observer, he had nopower of reasoning.

短語as well founded，as是什么詞性/成分？well founed是什么詞性/成分？

同意劉老師的解答。不過well fouunded或well-founded在此為形容詞。as well-founded為賓補。

與其說賓補提前，不如說是賓語后移。由于英語句子有尾重原則，結構復雜的賓語后移到句末，就是遵循尾重原則。這種現象稱為賓語后移——postponing of the object.