When their father died,they thought it their duty to keep Eric in hiding.这里面为什么要...

When their father died,they thought it their duty to keep Eric in hiding.这里面为什么要...

题目
When their father died,they thought it their duty to keep Eric in hiding.这里面为什么要...
When their father died,they thought it their duty to keep Eric in hiding.这里面为什么要加it?
答案
it是 形式宾语啊,真正的宾语是后面的动词不定式.其实it后面省略了to be,加上了之后是不是好理解了呢,你可以把句子还原成这样:they thougut it to be their duty to keep eric in hiding.或者they thought to keep e...
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