I didn't go home until the concert was over为什么要用didn't 和until呢?

l didn't go shopping yesterday.i didn't ny homework at home 同义句转换 I didn't go home until I finished my homework 中 finish 为什么加ed? I didn't go home until the concert was over为什么要用didn't 和until呢? I know they didn't go home until they finished that task.语法正确吗? I didn’t go to bed until my mother（ ）home.Agot Barrived inCreachDgot to I didn't my home work.(改错) Really sorry!I have not a love you!Please forgive me,I didn't go home!写的是什么? I read books at home last weekeng. I didn't go shopping. 保持原句这么做 I read books at home last weekeng.I didn't go shopping.保持原句 如何做 Why go?I didn't hold you? why didn't you go home yesterday? 改为同义句 he didn't go home until 9:00 didn't he go home last Sunday 是什么疑问句 why didn’t you go home yestotay?同义句 Jane didn't go home until 6 pm 同意句 I didn't go to Mary's home . I went to the cinema .合并成一句I went to the cinema _______ ______ going to Mary's home. I didn't go to the museum.Instead ,I watched TV at home这个同一句转换I _____ _______ at home _______ ________ to the museum I didn’t go to bed _ my mother came back home last night.是用till还是until