为什么要用did而不用do,

为什么要用did而不用do, What did your boss say to him 中为什么不用do而用did?如题. Did you see the accident,sir?这里为什么用Did而不用Do,谁能解释下... How much did the computer cost ben?这句话中为什么要用did不用do? Did you use to afraid of the dark?为什么要用did为什么要用did，而不用are 为什么 过去做某事 用 what did you do不用 what did you did what did he do last night He drink any water .为什么 用any 修饰水 而不用some what did he do last night He drink any water .为什么 用any 修饰水 而不用some 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:Did you set the alarm clock?B:No,I am off tomorrow.为什么用did you.而不用 do you. 【急求】在什么情况下疑问句中要用助动词do?什么时候要用do/did/dose?什么时候不用?就像what did you do? 和 what happened? 为什么第二句话不用what did happened? 什么时候用what+does/do/did提问rt那什么时候用what+is/are提问呢。why are you late for school?为什么用are，而不用do？ when did he leave?when did he leave?这里为什么不用leaves而用leave呢, I did not enjoy it为什么用did而不用could he did not understand English.句中的为什么用did 而不用was? （what did you do yesterday ） l went to the park yesterday 为什么用what 和do 而不用where、go呢what do /where go 一个是做什么 一个是去哪 went to the park是地点 为什么用what did you do yesterday 不用where did you go yes what do you usually do on rainy days为什么要用on而不用in? when do your parents visit their friends 为什么用do 不用did