下面两个倒装句为什么一个半倒装,一个全倒装.
（So confused did he become） that he did not konw how to start his leccture.
（So clever are the construction robots） that they may eventually reduce the amount of labor needed on construction sites by 90 percent.
为什么第一个句子用办倒装，第二个句子用全倒装