When did it start?为什么did用过去式?

When did it start? when did it start? 解释 是when did it started还是when did it start? When did it start?About ______ ago. When did it start?为什么did用过去式? when did you start doing it?请翻译 When did it start?About ______ago.怎么填? When did you start out? when did you start to______? -When did he start his own business?-_____in 1998______he graduated from his senior high school.答案为什么是 It was when这难道不是强调句吗 when did you start to learn english? 怎样回答When did you start school? when did you start （）(hiccup) When did Lu Xun start to write 英语时态知识 when did you start class today?为什么是过去式? 强调句和定语从句混淆-when did your brother start running his own business?-It was in 2008( )he was still a college student.这里到底是不是强调句型?用that为什不可以,不是说去掉it was...that...句子结构成立的话就 May it be when evening start when did you start learning English?改为同义句