It用作形式宾语:当不定式(短语)、动名词(短语)或从句在某个句子中作宾语时,为保持句子结构平衡,避免句式结构的混乱,常用it作形式宾语,而将真正的宾语放在句尾。此时it仍只起先行引导作用,本身无词义。it作形式宾语多用于下列句型中。
1、当不定式(短语)、动名词(短语)或从句在复合宾语结构中作某些动词的宾语时(如think, make, find, consider, feel, suppose等)。例如:
They found it pleasant that they worked with us Chinese.他们发现与我们中国人一起工作很愉快。
I don’t feel it difficult to understand the Special English.我觉得理解英语特别节目并不难。
He makes it a rule never to borrow money.他立志决不向别人借钱。
I think it no need talking about it with them.我认为没必要跟他们谈。
2、某些表示“喜、怒、哀、乐”的动词,如like, enjoy, love, hate等,往往不能直接接宾语从句。例如
I don’t like it that he’s so lazy.我不喜欢他那么懒惰。
I hate it when my mother asks me to eat eggs.我讨厌母亲要我吃鸡蛋。
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.)