Buttheydosobasedontheirexpectationsoffuturetrendsinsupplyanddemand,notonwhims.英语语法问题,这里的basedon是当作介词短语作状语吗?还是过去分词?还是什么?

Question

But they do so based on their expectations of future trends in supply and demand,not on whims.
英语语法问题,这里的based on 是当作介词短语作状语吗?还是过去分词?还是什么?

Answer 1

based on == according to -- - - -./ having - - - - as the base
based on their expectations of future trends in supply and demand,not on whims.--------介词短语作状语.的确是过去分词做方法状语.也可以当作插入语成分,因为它的存在与否不影响they do so 的意思.