he had left by the time I got there.的意思

翻译By the time he comes,I'll have left.( By the time he came,I had left.) Mary told me that he had left by the time i got there的意思为什么要用had left by the time he got to school,he realized that he __his homework at homeA.had forgotten B.had left he had left by the time I got there.的意思 when he got there ,the train had alreadly left...能改为by the time i got there. He came back late,___which time all the guests had already left.A.after B.by C.at D.during Did you see Tom at the party?No,he()by the time I got there A leftB was leavingC had left D was left选择,分析下 --Did you meet the professor at the airport?--No,he _____ by the time I _____ there.A.had left;got B.has left ;reached C.was leaving ;got D.left ;had got Unluckily,he didn't get to the station until the train __(leave) 这里填left和had left应该都可以吧严格来说是用had left吧? An Easy Enlish question .I don't remember why she left the boy by himself .而为什么不能说I don't remember why she had left the boy by himself .PLEASE PLEASE PLEASE! 几道英语选择,需要原因1.---Frank isn't in the house now.---____ left by the back door?A.Had he B.Must he have C.Should he have D.Could he have2.I'm sorry ,but I must say his English still___.A.need to be improved B.needs to improve He reached the station______the train had left(介词填空) Hardly had he arrived when the bus left.翻译 if he had left yesterday,he ___ there by tomorrow用will be 还是would be ___I left school he had taugh our class for two year.A.Whenever B.The moment C.BY the time如何选, 请选择并讲解He ___hardly ___the station when the train___A.had,entered ,had left B / ,entered ,left C .have ,entered ,left D.had ,entered ,left 英语翻译said he'd been here for quite a while.when they found him by the riverside.those bones won't be identified,oh Lord,oh yeah!but they saw a man the other night,yeah he looked just like a lookalike.but the man that I had left to die,oh Lord, 改错题.怎么改正?为什么这么改?By the time you left school,he had begun his own company.--- ------------ -------------- -----A B C D怎么改正?为什么?