what she wants to know is which dress she should buy是个什么从句,并帮我分析下 主语从句还是表语从句?

问题描述:

what she wants to know is which dress she should buy
是个什么从句,并帮我分析下
主语从句还是表语从句?

宾语从句
改成肯定句是
she wants to know which dress she should buy
know后面是宾语, 问句是对which...提问

主语:what she wants to know (what引导主语从句在整句话中作主语)
谓语动词:is
宾语: which dress she should buy(which引导宾语从句)
句意:她想知道的是她该买哪一条裙子。

主语从句,及表语从句.(what she wants to know)is [which dress she should buy].()中的完整句子作为后面句子的主语,叫做主语从句.[]中的完整句子,作为系动词is的表语,叫做表语从句.译为:她想知道的是她该买哪条...

What引导的主语从句.
主语:what she wants to know
系动词is
which dress she should buy充当表语.