Please provide an email address where to send the trial code.为什么用 where to?

问题描述:

Please provide an email address where to send the trial code.为什么用 where to?
where是副词吧?
我认为应当是:Please provide an email address where send the trial code to.
因为我认为是“to where”(到哪),而不是“where to”(哪到).

给你个简单的句子:i do not know what to do 一样的道理