by the time I came back they had climbed up..by the time I came back they had climbed up ten metres现在完成时的结构不是has/have加动词过去分词么?为什么不用have climbed?

翻译By the time he comes,I'll have left.( By the time he came,I had left.) By the time i——back they——up ten metres.A came.have climbed B came.had climbedC come.have climbed D had come.climbed Had they g_____ up by the time I came back home? ( )I could not finish the work____________.A.by the time he had came B.until he has comeC.when he comes D.before he came( )There_________the bus!Hurry up!A.is coming B.comes C.has come D.come I wondered if that last time he came by had been the last I'd ever see of him.翻译 By the time my father came home from work,I （）（finish）watching the football match 动词填空 by the time I came back they had climbed up..by the time I came back they had climbed up ten metres现在完成时的结构不是has/have加动词过去分词么?为什么不用have climbed? I knew I could not finish the homework()A.by the time he had come B.before he came C.until he has come D.when he comes选什么为什么?句意? I wish that the parcel ____ in time.A ,came,B,would come C,should come. He came back late,___which time all the guests had already left.A.after B.by C.at D.during by the time I'm 30?翻译! I came here right from work.I didn't have time to stop by my apartment by the time you came back,we (complete)the work by the time he comes back,we (complete)the workby the time you came back，we (complete)the workby the time he comes back,(complete)the work I hear this is the first time you _____ here.A.come B.came C.will come D.have come By the time he came.I_____(complete)the work.我已经知道答案,我是初学者. i fall in love with this city__I came here.This is the second time weA forthefirsttime havebeenhere B for the first time had been here C the first time have been here D the first time hadbeenhere选哪个！ —Is this the first time you _________Chengdu?—No.But the first time I _________here,the city wasn't so beautifulA.visited; came B.visited; have comeC.have visited; have come D.have visited; came John came back late,___________ which time all the guests had already left.(A)after(B)by(C)at(D)during选什么啊.