“How long does it take to get home?”里面it指代什么?

问题描述:

“How long does it take to get home?”里面it指代什么?
How long does it take to get home?里面的it是指代人还是指代一种交通工具?
为什么课本里面还出现了“How long it takes to get to his grandparents' home?里面的do怎么没有了?
可不可以写成How long is it from school to my home?
请分开回答,

it代指to get home,带一件事,do可加可不加,不加了take 变成takes,因为是it 第三人称单数形式,不可以写成How long is it from school to my home,因为这样翻译不通,变成了从学校到我家多久,“汉式英语”但可以写成How far is it from school to my home.太谢谢了,我把悬赏提高了,再问一下,为什么一个句子里面有了does其他的动词都不用变成第三人称,但是有的句子里面几个动词都要变成第三人称的形式?因为do 变成does 已经变成第三人称形式,一个句子中有一个变了就够了,其它不用变,有助动词do的,就do先变,其他就不用动了,How long it takes to get to his grandparents' home,里没有do所以take作为动词,只能它变了,变成takes.其实does 是 do 的第三人称的形式,已经变过了补充:你回家要多久”按照第一个句型翻译成:How long does it take you to get home?