Duringapresentation,it'simportanttovarypitchtosomeextentinordertomaintaininterestinorderto可以看成to吧tovary后面整个是it的真正主语吧tosomeextent是个副词吧修饰什么呢

Question

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

Answer 1

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.