I think it our duty to study.I think it complete

问题描述:

I think it our duty to study.I think it complete
I think it our duty to study.
I think it complete a waste of money.
为什么第一句是对的,第二句却是错的?

think + it + 名词
our duty是名词短语,而你第二句却是用了一个形容词complete直接放在it之后,这显然不对.complete 应该修饰waste.第二句应该是:
I think it a complete waste of time.