during when, during which, during which time 的用法与区

   "Well, if you were in this White House and you had seen the reaction in the public and in the press to the idea that Dan Quayle would be acting President for a few minutes during when they were going to give that shock treatment for the irregular heartbeat, I think probably if you were sitting in that White House, you wouldn't want to do that unless you had to."

这个句子应该是来自英美出版物或英文网站的句子，是讲母语的人说的话。其中during为介词，后接when引导的名词性从句，介词短语作would be的时间状语。when在此不是疑问词，而是融合型关系词，即when本身融合了先行词和关系，等于the time when.

And, of course, this was during when they were repressed in Victorian time, and their bodies were speaking for them.

这个句子中的during when+从句和上句结构相同，when=the time when. during后接名词性关系分句构成介词短语，介词短语作表语（不是表语从句）。现代语法会认为be在此是不及物动词，意为happen/take place, 介词短语是时间状语。

这两个句子中的during when都不能换成during which time. 因为当which指代主句内容时，只能引导非限制性定语从句（现代语法认为是关系分句作补充性状语），而以上二句中的during+when从句都是必具性修饰语，不可缺少。

《韦氏词典》和《柯林斯词典》均认为when作为代词可以是疑问代词或关系代词，英文释义为what time (疑问代词），which time (关系代词）。《柯林斯词典》并有如下例句，其中since when显然引导非限制性定语从句，when可用which time替换：

We came a week ago, since when we've been very busy.

关于during which和during which time, 可参读wdxzdhw网友提供的连接，不再赘述。