He felt it his duty to.为什么不是He felt it is his duty to .
问题描述:
He felt it his duty to.为什么不是He felt it is his duty to .
答
两者形式都是对的.
前面一句it形式宾语 后面his duty to是宾语补足语
后面一句feel后面是从句,当然is 要改成was才是对的.