Aweekbefore,hehadcompletedasuccessfuloverlandflightduringwhichhecoveredtwenty-sixmiles.请问这句话中为什么有during?它起到什么作用如何解释.如果去掉during这句会有错误吗?

Question

A week before,he had completed a successful overland flight during which he covered twenty-six miles.请问这句话中为什么有during?它起到什么作用如何解释.如果去掉during这句会有错误吗?

Answer 1

‘he covered twenty-six miles' 是个不完整的语句,原句的意思是在这一飞行过程中 他飞出了26英里的距离,所以在前面需要加个during ,用来修饰 flight 这个名词.从句在结构上已经完整,但是意思上还没能说清楚,所以需要前面加during （flight）来说明.