Aweekbefore,hehadcompletedasuccessfuloverlandflightduringwhichhecoveredtwenty-sixmiles.during在这做什么成分?

Question

A week before,he had completed a successful overland flight during which he covered twenty-six miles.
during 在这做什么成分?

Answer 1

介词,后半部分是定语从句.可分解为: During the flight he covered twenty-six miles.整句话的意思是一周前,他完成了一次成功的陆地飞行,在这次飞行中他飞了26英里.