同位语从句：i have no idea what has happened to him

来源：学生作业帮编辑：搜狗做题网作业帮分类：英语作业时间：2024/04/30 06:47:02

同位语从句：i have no idea what has happened to him
不是说同位语从句中引导词不作句子成分吗?此处what应该作何解?
不要复制粘贴一些网上的同位语从句和定语从句的区别，我只是对句话表示费解而已

1、同位语从句是名词性从句的一种,其他还有宾语从句、表语从句、主语从句）.名词性从句有三种形式：
由that引导：that 只是关联词,没有具体意思,在句中whether / if.由 whether / if：关联词 whether（if）有具体含义,但在句中whether / if由 wh- 式连词引导：这类连词属于代词或副词,在句中充当成分.
2、同位语从句一般是对抽象名词进行具体说明的从句,相当于表语从句对主语进行说明.所以在判断是否是同位语从句时,可以把被说明的名词与从句改为主系表关系,如果成立,那就是同位语从句.如本句中的 idea what has happened to him 改为 the idea is what has happened to him（这个想法就是他究竟遇到了什么情况）.
另如：
　　This is our (problem that the system is failing our citizens). 这是该制度让我们公民失望的问题.　　 — 括号部分可以改为 Our problem is that the system is failing our citizens（我们的问题是该制度让我们的公民失望）
　　The (question when they will give us a reply) is not known. 他们何时给予我们答复问题尚未可知　　— 括号部分可以改为 The question is when they will give us a reply（问题是他们何时给予我们答复）

I have no idea what has happened to him为什么是同位语从句 i have no idea what to do with him. I have no idea what size shoes she wears.后面的同位语从句,为什么主语在后面呢. i have no idea后到底接的是同位语从句还是宾语从句 I have no idea where he comes from是同位语从句? 同位语从句只用that作为开头（I have no idea除外）为何为啥I have no idea when he will be back是同位语从句 They have no idea at all where she has gone .这句话是同位语从句还是宾语从句 I have no idea how soon they are coming .请问这句话中的从句时同位语从句还是定语 I have no idea what to 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 which 可以引导同位语从句吗?I have no idea which one I should choose?是什