It took us one week to finish the work.我们花费了一周的时间完成了这项工作.It是做什么的啊?改成we took one week to finish the work.为什么不能we took one
问题描述：
It took us one week to finish the work.
我们花费了一周的时间完成了这项工作.
It是做什么的啊?
改成
we took one week to finish the work.
为什么不能we took one
答
It took us one week to finish the work.(=We spent one week in finishing the work.)it 在这里代替 to finish the work,因为主语是to finish the work太长,所以用形式主语it代替. 至于We took one week to finish the work.这种说法也可以，不过一般不用，因为不太地道。
答
it做形式上的主语。
答
it 在这里代替 to finish the work,因为主语是to finish the work太长,所以用代替.还有句子比如:我步行到那儿花费了多长时间,it took me a long time to walk there.句型就是:it take sb sometime to do sth...
答
形式主语。没有实际的意思。
不能说we took one。。
而需说：we spent one week to finish the work