问 so+adj.+be+主语
问题描述：
问 so+adj.+be+主语
RT 是否有这样的结构,能否详细讲解说明?
看到的是这样一个句子：
So numerous were the inventions devised to lessen the drudgery of washing clothes that the origin of the washing machine is unclear.
答
这是一个so...that句型(如此...以至于)的倒装强调说法.不倒装的句子是这样的：The inventions devised to lessen the drudgery of washing clothes WERE SO numerous THAT the origin of the washing machine is unc...