He didn't leave until school was over .从句为什么用过去时?

He didn't leave until school was over .从句为什么用过去时? I didn't go home until the concert was over为什么要用didn't 和unti I didn't leave until he came back 同意句转换：It was _____ ______ He didn't arrive until the meeting was nearly over,for the s 1 He didn't leave until he _______________________(看完小说). She didn't leave school until the rain stopped. he didn't leave until he heard the bell ring.可以用ing形式吗 He didn't leave here until the rain stopped. 用英文解释句子:I didn;t leave until he came back I didn't leave until he -----这里用come还是came? he didn't get home from school until 6 clock. I didn't leave school until all of them went home的同义句 I___ _