we consider it our duty to help the old

来源：百度知道编辑：UC知道时间：2024/05/03 00:12:29

既然it代替动词不定式，那为什么it后面不加is？

这里我深信可以加is
这个句子两种理解
不加is的话
we
主语
consider谓语
it 宾语
our duty to help the old宾补

如果加上is也是成立的
we
主语
consider 谓语
it is our duty to help the old 省却that的宾语从句
所以这里加不加is都是可以的，意思也是一样的，但是句子的结构成分是截然不同的！！

这里it做宾语，our duty做宾语补足语，所以不可以加s。
这种句型许多同学容易把它当作宾语从句（也就是后面会加上is等谓语，其实是不对的）。这主要由这些动词决定的，其他还有：
I find it hard to do the job.
He felt it his duty to help Tom.
等。

our duty在这里是it这个宾语的补语。

这是个复句中间省略了that.原句应该为we consider it that our duty to help the old

it是形式宾语，再加动词就两个谓语打架了

We must consider whether it will be worth while. if it breaks we consider it sold to you是什么意思呢 We consider Mr. Zhang a good teacher. do you consider it any good____again? do you consider it any good ______more people over there we can no longer _to consider water an almost free resource that we can use as much as we like 译Well,to get business done,we can consider making some concessions in our prices. we are got it all We will foot it.翻译 LOVES，WE CAN SEE IT，HEAR IT AND HEAR IT！