He didn't leave until school was over .从句为什么用过去时?“UNTIL 等引导的状语从句,从句中的一般将来时要用一般现在时代替”是不是单指一般将来时?

he commanded that the stuents _the classroom before he retureda,didn't leave b,wouldn't leave c,needn't leave d,not leave he didn't leave until he heard the bell ring.可以用ing形式吗 Didn't he leave a m____for you to tell you where he was? In such a hurry _____ that he didn’t say a single word.A.did he leave B.he left C.left he D.he did leave 要解析：For he ___A(C)___(wait) until it stopped raining.A.waited B.didn't waitA.leave B.left C.didn't leave He didn't leave here until the rain stopped.在这句话中为什么用leave 而不用left? I didn't leave there until he come back 另一种英语怎么解释?xiexie 用英文解释句子:I didn;t leave until he came back i didn't leave before he came back的同义句 He didn't leave his office an hour ago.（改为肯定句）～ 英语 Millie's father didn't leave until he saw her cross the road ------- (安全地) although he was lived with us four years,he...us much impression答案是hasn`t left为什么不是didn`t leave或者doesn`t leave Where is he now?-he is at work now snd he_______until the operation is over.答案为什么是didn't leave 与won't leave有什么区别? He didn't leave until we came back(改为同义句)He _____ ______ we came back. Kangkang didn't notice Hugh ____(leave). remember___leather shoes tomorrow!I won'tA.no to wear B.to wear C.wearingHe didn't want to leave here._______A.No,he didn't B.Yes,he didn't C.No,he did请问这两题怎么做,为什么? Where is Mike?He‘s still in the classroom.He___（leave）until his teacher comes是不是填not leaveA.not leave B.leaves C.didn’t leave D.won't leave didn't leave his office-----he finished his homework ----填（） a since b until 理由也要