By the time I have eaten my breakfast,it's eight o'clock.请解释一下这一句中by the time的用法.为什么从句要用现在完成时?我一般见得都是By the time 过去时，过去完成时。没有见过By the time加现在完成时的

翻译By the time he comes,I'll have left.( By the time he came,I had left.) by the time i see you again i ___from that schoolhave graduatedgraduatewill have graduatedgraduated I -----my work by the time the teacher ----- back.shall have finished,comes 为什么填这个 i shall have finished the job by the time he returns from work怎么翻译? ______you read the letter,I will have gone to Paris.a.At the cost of b.A number of c.A great deal of d.Disappointing e.By the time f.Every time I will have left for America by the time he arrives这句怎么翻译? In the office i never seem to have time until after 5:30 p.m by time many people have got time正确语序是什么 by the time I'm 30?翻译! By the time I got to the bus stop,the bus alreadyA had leftB leftC have left D leaves -Have you heard the song Super Star?-Yes,I hear it sung by S.H.E. I will have finished the homework by the time mymom comes back这句话翻译成中文怎么翻译 In the office I never seen to have time until after5.30-many people have gone home.which time,改为by which可以吗,为什么 In the office I never seem to have time until after5:30pm,____many people have gone home. when和by which time 填哪个 I ____writing the article by the time you get back.(2 分)A.shall finishB.must have finishedC.have finishedD.shall have finished With time pass by ,I have lost myself i shall have finished writing the article by the time you get backi shall have finished （writing the article ）by the time you get back中间这个是个短语吧 所以writing是动名词?finish doing 是用法? By the time you get to Beijing tomorrow,I ____2____ for Shanghai.By the time you get to Beijingtomorrow,I ____2____ for Shanghai.A) am leavingB) should have leftC) will leaveD) have already left（B）为什么D不可以? 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?