OG上的语法题InGermany,forestersdiscoveredthattreeskilledbyacidrainhadbeguntodiefouryears（carlier,eventhoughthetreeshadshownnosignsofdiseasethen.）D.earlierwithoutanysignsofdiseaseshownthen想知道问世么不

Question

OG上的语法题
In Germany,foresters discovered that trees killed by acid rain had begun to die four years （carlier,even though the trees had shown no signs of disease then.）
D.earlier without any signs of disease shown then
想知道问世么不能选D,

Answer 1

你要明白两大分词的基本语态.现在分词表示主动,过去分词表被动,它们的逻辑主语都是真主语即主句的主语.这个D如果改动一下倒是可以的,earlier without showing any signs of disease then 否则根本讲不通