-----did you------your homework

When did you finish your homework.

你什么时候做完家庭作业的.

when...do
where...do
how...do

how did you finish your homework?
<br>试图改正我的那位仁兄,你看好了,这是问句...
<br>前面不是已经有DID了吗!

二楼的finish应该加ed
应该这样How did you finished your homework.

When did you finish your homework?