when did you bring it to us为什么用did 不用were?when were you brought it to us
问题描述：
when did you bring it to us
为什么用did
不用were?
when were you brought it to us
答
顶一楼
答
when did you bring it to us
是you brought it to us的特殊疑问句形式。
were是be动词的过去式，brought是动词bring的过去式。一个句子里不能同时出现两个动词。
答
were 是不及物动词，Bring 是及物动词。
一句话不能有2个动词的！
答
用were就变成被动时态了
when were it brought to us,而不是you做主语了。
答
A brings something to B 表示A给B带来了某物.
它用when的问句就是when does A bring something to
（A什么时候给B带某物来?）
如果用were,应该是Something were brought to B,是被动语气,表示某物被带来给B.
在这句话,如果填Were表被动,至少应该是When were it brought to us?（它什么时候被带来给我们?）或者When were you brought to us?（你什么时候被带来给我们?——语法对,句意不通）.但后面有了it,说明这句话不是被动,所以要填主动的did.