The acrobat was walking on the thin wire as though she __on the groun .A.had walked B.had been walki

题目

The acrobat was walking on the thin wire as though she __on the groun .A.had walked B.had been walking C.were walking D.walkld 主句与从句谓语动作同时发生,从句应该用一般过去式 ,就应该选择D,为什么答案选择C

答案

as if 后面说的与事实相反（事实是他在钢丝上走而非在平地上） 所以是虚拟语气 be动词统用 were