I found it impossible to answer such a question in class.帮忙划分句子的成分

问题描述:

I found it impossible to answer such a question in class.帮忙划分句子的成分

I是主语,found是谓语,it在句中是作found的宾语,同时又是to answer such a question in class的形式主语,impossible是宾语补足语.