i did not understood the problem until he had explained it这句话是不是错了,我晕,我在新概念第十四课看见这样的句子,当时就仔细核对了N次,树上果然是这样写的,哥我当时就懵了!本人在新华书店买的正

I _____ the prolem until he explaind it.A.understood B.did not understand C.had not understood D.had understood i did not understood the problem until he had explained it.这句可以改成i had not understood the problem until he explained it.这样 为什么 选哪个,请给出原因.Fiona did the opposite of what I asked her to do.She______what I said.A.might not have understood B.can't understand C.can't have understood D.mustn't understood I did not understand the problem.He explained it.请用until把两句连在一起可是书上的原句是这样的：I had not understood the problem until he explained it.为什么是had not understood 呢 She seemed __what I said.I had __again.A to understand to be sayingB did not understand saidC not to have understood to sayD to have understood been said I hardly understood what you said改为反义疑问句是I hardly understood what you said,did you?还是I hardly understood what you said,did 还是其他. ezio的遗书,求意大利文When I was a young man,I had liberty,but I did not see it.I have time,but I did not know it.I have love,but I did not feel it.Many decades would pass before I understood the meaning of all three.And now,the twilight of my I did not ask Perhaps I have understood,not to return to the past. not until的过去完成时有这样两个句子：1.The young man did not wake up until the bed had struck the ground.2.I had not understood the problem until he explained it.哪一个正确?具体讲讲原因呗. 这个单词怎么不是过去式?He lent me a book,I read a few lines ,but I did not understand a word.这句话中的understand 怎么不是understood? I did not enjog itenjoy 题目是把两句话连成一句 We did not disturb him (until) He finished work.1.We did not disturb him until He had finished work.2.We had not disturbed him until He finished work.哪句正确为什么?书上有一句例句 :I had not understood I did not buy anything.He did not,eith 请问一个英语问题：I did not understand the problem.He explained it 两句连成一句新二书中为：I did not understood the problem until he had explained it 为什么 后面不是：he explained it 难道不应该是：不懂这个问 I can not beliveve I did that I could not make ----English A myself understand in B myself understood in 我想知道I don't think you understood loves not bindly accept是什么意思