I have no idea which to buy.这里的which引导的是同位语从句吧?为什么书上说which不可以引导同位语从句?

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Ihavenoideawhichtobuy.这里的which引导的是同位语从句吧?为什么书上说which不可以引导同位语从句?Ihavenoideawhichtobuy.这里的which引导的是同位语

I have no idea which to buy.这里的which引导的是同位语从句吧?为什么书上说which不可以引导同位语从句?
I have no idea which to buy.这里的which引导的是同位语从句吧?为什么书上说which不可以引导同位语从句?

I have no idea which to buy.这里的which引导的是同位语从句吧?为什么书上说which不可以引导同位语从句?
本身which to buy 不是从句.而且这里如果用 I have no idea which I should buy.后半句就是同位语从句了.
which不可引导陈述性的同位语从句,如：He knew the fact that he was fired.其中that不可换为which.
但疑问性的可以用很多疑问词引导.如：The question who should do the work requires consideration.
包括which 如：They are facing the problem which one they should choose.
如果是一般疑问句,只用whether,不用if.

I have no idea which to buy.
have no idea 等于don't know,所以这里可以把which to buy看做是动词不定式的特殊形式做宾语。

你应该说I have no idea what to buy~~~

句意：我不知道买哪个?
which•••在这里是名词性从句，做宾语。

I have no idea I have no idea learning the subject which have to pass.翻译… You have no idea （ ）worried I was（）里为什么用how 不用that、which? which 可以引导同位语从句吗?I have no idea which one I should choose?是什么从句? I have no idea!的同义句 I have no idea about it. I have no idea what to I have no idea． 啥意思. i have no idea 啥意思 i have no idea about latest You have no idea what I feel I have no idea what do you I have no idea how to I have no idea which one he will choose.中 idea 后面的which 引导的句子是同位语从句吗 i have no idea which was better so I took ___ of them 代词i have no idea which was better so I took ___ of them 为什么答案是 both 为什么 all和 none 不行 填空：“I am not sure which tie to wear for the party.God!I have no idea,____(either/neither). I am not sure which tie to wear for the party.I have no idea,either.为什么不用neither? You have no idea how STRESSED I am You have no idea how STRESSED I am