怎么理解 what is it you want to do?分析下语法?

这句话和 what is it that you don't like about winter weather?（你不喜欢冬天的哪一点那？一样，全句应该是：what is it that you want to do?（你想干的是什么？）语法分析：首先这是一个特殊疑问句，而且是个带有从句的特殊疑问句，it 是形式主语，真正主语是that you want to do 这个从句。

应该是What do you want to do？

你好。应该是强调句what is it THAT you want to do? -------其中你省略了that.
强调句结构是： it is / was -- - - that- - - - --
例句：i want this book (如果强调this book).----------- it is this book that i want.
i want this book (如果强调 I )---------- it is i that want this book.

你到底想干什么呢？what you want to do作表语，it是形式主语

怎么理解 what is it you want to do?分析下语法?
答：我的理解就是,它是What is it that you want to do?这个强调句型的特殊疑问句之漏打了一个词that.
请看句子的变化过程：
I want to join the army.肯定句.我想参军.
就join the army 提问：
What do you want to do?你想干什么?《---You want to do what?
就句中的what进行强调：
It is what that you want to do.
一般疑问：Is it what that you want to do?
特殊疑问：What is it that you want to do?
译：你想做的（究竟）是什么?

语法错误：应该是What do you want to do？

What do you want to do？