where were you do last sunday?这里为什么不能用were,而用did

你为什么这么做?翻译为why did you do?为什么这里要用did的,而不能用do? A:where were you last night?B:i forget.为什么这里用forget? where were you last weekend?what did you do yesterday?i was 连词组句.（1）you,were,where,sunday,last Do you know where the rest students were last night 这句 为什么用w Where were you yesterday?为什么用were 为什么where were you last night 句子里用的是were ? Where were you last night? where were you last sunday?-----第2：where was your mother yes This is the room where we lived last year.这里为什么不能用关系代词that而用 where did you do last night,last night前为什么不加on I thought you were be taller.这里为什么不用was,而用were?