宾语从句和同位语从句的区别
先看一个句子,There is disagreement among economists about what money is and how it can be measured.书上说这个句子是宾语从句.又有另外一个句子,There is no doubt that the water in the river has been seriously polluted.书上说这句是同位语从句.我感觉他们两句很象,偏偏又都是there be结构,很不好判断.