when did you bring it to us

when did you bring it to us 英语翻译when did you bring it to us?I bought it hear three days when did you bring it to us这句话不是一般过去时吗?那为什么bring不变成brought.就 问几道英语问题 1,When did you bring your car in to us?请问句子中的“in”代表什 When are you going to bring your book （ ）us When are you going to bring a book（ ）us A for B to when you bring to car your did the garage连词成句 do visit us when it is convinent to you when did you have it When did you know it? When did you go to When did you come to