网友的句子，通常的说法是把介词放在疑问句的末尾，即：
Who did you speak with?
Where did this wine come from?
What are you complaining about?
但在正式场合或正式文体，也可见到将介词放在特殊疑问句句首的例子，所以下面的句子也不能算错，只是比较正式而已：
With whom did you speak?
From where did this wine come?
Aabout what are you complaining?
