Do you know where the rest students were last night 这句 为什么用w

Do you know where the rest students were last night 这句 为什么用w Where were you last night? 为什么where were you last night 句子里用的是were ? A:where were you last night?B:i forget.为什么这里用forget? Hello,Tom,where were you last night do you know what ____to end the skrike last night? Do you know who was the last_____the classroom last night? where did you do last night,last night前为什么不加on 回答下面问题：1.Where were you last night?2.How often do you make y do you know ___for shanghai last night? Where did you sleep last night 请问这句sleep为什么不用过去式slept .— Where were you last night?— I was in the library.I ______