为什么不用过去时?I haven't summoned you here for apologies.我不是叫你来道歉的.这句话为什么用现在完成时,不用过去时.

为什么不用过去时?I haven't summoned you here for apologies.我不是叫你来道歉的.这句话为什么用现在完成时,不用过去时. I haven't heard from some of my old friends these years.不是翻译.这属于什么句子. 讲解下语法. 为什么不用过去是呢? They must have arrived by now,haven't they?为什么用haven't they?不用didn't they?by now 布什表示过去发生的吗 为什么不用过去时 I ___ him very well,but I haven't seen him this week.为什么用know不用had known We haven't got many tomatoes,为什么不用 any tomatoes I couldn't see anything unusual in this room.请问这里的see为什么不用过去时? I haven't seen you for weeks.How is your English study going?(Very good)thanks.为什么不用very well I haven't seen you for weeks.How is your English study going?(Very good)thanks.为什么不用very well I haven't seen you for a long time.You look much _____ ( health )为什么这里不用healthier?同上 we are leaving tomorrow and i haven't even started packing yet为什么用动名词,不用动词吗? i'm sorry.we haven't got the tickets __for__ the concert.为什么不用of而用for I don't have a computer.Does she got one?为什么不用“get”?如果是过去时为什么不用“did”开头提问? i( ) from him since he leftA didn't receiveB haven't gotC haven't heard为什么? 请用have和haven't造10个过去分词的句子如：I haven't eaten a dinner I haven't made 高一单选一道Edward,you play so well.But I _____ you played the piano.A.didn’t know B.hadn’t knownC.don’t know D.haven’t known为什么不选B?不是过去的过去吗》 英语翻译为什么不用过去时