Not until my mother came back,I did my home.3Q为什么这句话是错的?为什么要改为“Not until my mother came back,Did I do my home."为什么要这么改,所有这样的句子都是这样结构吗?再问一个问题,till一般都是用于"

I ---not--- ---(begin)to eat until my mother returns home. I ____(not,go)to bed until my mother came back home last night After my mother came home,I would go to bed.(用Not...until改写句子) My mother did not work outside the home until later in life的意思是什么 We didn’t have supper until my mother came back Not until my mother came back,I did my home.3Q为什么这句话是错的?为什么要改为“Not until my mother came back,Did I do my home.为什么要这么改,所有这样的句子都是这样结构吗?再问一个问题,till一般都是用于 any discounting?是问打折么?take my life ,杀人么 until 前一定要not 么为什么 mother won;t be back until 2 o'clock ,at 不行么?》 My mother--------(not do)housework yesterday. My mother------(not do) housework yesterday. my mother --------(-not have)a red bag My mother does not at home. not .until直到.才 时态用法会的来I didn't do my homework until my mother came back这句子前面的动词是过去式 后面动词也过去式,可是我刚刚听人说 前面动词是过去式后面动词是现在时.到底not .until直到. until...和not until... not ...until not.until. I to bed until I finished my homework(not go) I to bed until I finished my homework(not go) Sorry for my not checking the email until now.