朋友你好,
你所说的it 作形式宾语有几种形式:
It 代替不定式短语时:(像楼上的一种形式)
1. He feels it his duty to help others.
(他觉得帮助他人是他的责任。)
2. The new medicine makes it possible to treat this terrible disease.
(这种新药使治疗这种可怕疾病成为可能。)
It 代替动名词短语时:
1. We thought it no use doing that.
(我们认为那样做无济于事。)
2. Our teacher thinks it no good learning without practice.
(我们的老师认识光学不实践是没有好处的。)
It 代替
宾语从句时:
1. I think it very important that we take part in the discussion.
(我认为我们参加这次讨论是很重要的.)
2. Didn't I make it clear to you that I was not coming?
( 我不是向你明确表示过我不来了吗?)