反义疑问句填空,我想知道的是为什么是这个答案, The road is wet .It must have rained last night ,__________? He can't have left home,because the light is still on,_________? 答案分别是didn‘t it和has he,
It must have rained last night表示过去肯定下雨了,可以看成过去事实 ,didn't it He can't have left home, because the light is still on这是 must have done de否定句,与上句同理‘ 但用现在完成时反问,因为because the light is still on表示说话者一...