为什么不用had left,arrived?而用left,arrived.As my father(leave),the postman(arrive).当我爸爸离开以后,邮递员来了.为什么不用had left,arrived?新概念英语练习

为什么不用had left,arrived?而用left,arrived.As my father(leave),the postman(arrive).当我爸爸离开以后,邮递员来了.为什么不用had left,arrived?新概念英语练习 英语翻译为什么不用arrive at? Claire had her luggage checked before her plane left中主句为什么不用过去完成时 When he arrive at the station,the train______.A,has left B,left C,had left D,leaves It __ten years since he left Shanghai.为什么用is,不用had been.意思是“从那时有多久”？ His sister left home in 1998,and has not been heard of since.请问：AND后为什么不用“had”? work on it had begun before she left.这里为什么不用worked 不是过去发生的嘛 She must have left the town for home at Albany,for she did not show up at the party last night.为什么不用 had left? Mr White is the first person to arrive and will arrive at three this afternoon 为什么 the first person to arrive中 要用 to arrive 而不用 arrive 为什么在句子中We can't arrive late for class.中要用arrive而不用arrive in，arrive at，get to 等 新概念2的18课句子I had left it on a chair beside the door and now it wasn’t there.为什么连词用and不用but? Only when I left home ,did i realized how important it was to stay at home?此中为什么不用HAD I REALIZED? 为什么这里用动词原形?He had left the window (open)when he went to bed.用了open却不用opened? (Having waited)in line for half an hour ,Tom suddenly realized that he had left his wallet at home为什么不用To have waited 而用Having waited He left the knife ___he had found itA after B before C where D as为什么要用where 不用 after? 问两个时间状语的句子After dinner we waited for the concert to begin为什么不用waitBy the time you read this,I have left.为什么不是 I will leave或者I had left? 【选择题】Only when i left my parents for Italy ___ how much i loved them.A.i realized B.i had realizedC.had i realizedD.did i realize为什么呀,看不清.【】【】【】【】【】为什么不用C，完成时呢？注意：为什么不能 It was not until the run had set that the hikers( )at the foot of the volcano.A arrived B did arrive C had arrived D would arrive 为什么选A?not until 不用倒装吗?求详细分析一下句子成分,