During a presentation,it's important to vary pitch to some extent_英语解答

During a presentation,it's important to vary pitch to some extent in order to maintain interest
in order to可以看成to吧 to vary后面整个是it的真正主语吧
to some extent是个副词吧修饰什么呢

人气：442 ℃　时间：2020-03-28 14:57:21

解答

in order to可以看成to to vary pitch to some extent in order to maintain interest整个是真正主语,而it是形式主语
to some extent是介词短语,用作副词短语,修饰动词vary的结果.